Difference: LHCHXSWGTTH (1 vs. 53)

Revision 532019-06-19 - LauraReina

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META TOPICPARENT name="LHCHXSWG1"

ttH/tH Higgs Associated Production Process

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  • tt+bjets: as documented by the series of meeting in the 2016-2019 period and by the reports presented at the various HXSWG General Assembly Meetings during the same period, this has been the major activity of the WG. Thanks to the collaboration of the Authors of different NLO QCD+parton shower Monte Carlo generators, the comparison is now converging to a substantial agreement which will lead to the possibility of providing the experiments with well-defined recommendations for the use of the corresponding theoretical tools in experimental analyses. A WG note will be completed during 2019. The various stages of this study are documented here:
  • tt+V (V=W/Z)->multileptons: the study of this background is being prepared and will be the next major focus of the WG, with the goal of presenting preliminary results from this activity at the HXSWG General Assembly Meeting in October 2019.
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Subprocess categorization schemes (Run 1 and Run 2)

 
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Here is a handy flowchart for the CMS scheme in Run 1.
Note:
1. the jets we used are the selected good jets: Pt>30GeV, |eta|<2.4
2. all the b and c quarks in the MCparticles need to be final state particles and come after top and anti-top in the chain
--------------

Categorization of tt+b/bb:

Step 1: identify all the b quarks, b-from-t and b-not-from-t 
We go through all the MCparticles in each event, identify all the b quarks that come from top decays (b-from-t), 
as well as all the b quarks that are not from top decays(b-not-from-t). We do this by checking the particle's ID 
and its mother's ID.

Step 2: match jets to b-from-t
For each b-from-t, we find the closest jet which has the smallest dR(b, jet). If the dR(b, closest jet) is less than 0.5, 
we say that we find a jet match for this b-from-t and save the corresponding jet to the list of "jet-matched-to-b-from-t".

Step 3: match jets to b-not-from-t
For each b-not-from-t, we do the same dR matching as in step 2. If we find a match and the matched jet doesn't 
match to any b-from-t(not in "jet-matched-to-b-from-t"), we save the b-not-from-t to the list of "matched-b-not-from-t" 
and the jet to the list of "jetmatched- to-b-not-from-t".

Step 4: count of the number of "matched-b-not-from-t" and "jetmatched-to-b-not-from-t"
Sometimes two b quarks are mateched to the same jet, so we remove the duplicates in "jet-matched-to-b-not-from-t" 
before we do the counting. If we only find one "matched-b-not-from-t" which also has a jet match, or we find two 
"matchedb-not-from-t" but only one "jet-matched-to-b-not-from-t" we call this event tt+b. If we find two 
"matched-b-not-from-t" and two "jet-matched-to-b-notfrom- t" or we find three or more "matched-b-not-from-t" we call this
event tt+bb.

--------------
Categorization of tt+cc
Step 1: identify all the b quarks, and c quarks (c-from-bW and cnot-from-bW)
We go throught all the MCparticles in each event, identify all the b quarks regardless of its origin. We aslo identify 
all the c quarks that come from b or W decays (c-from-bW), as well as all the c quarks that are not from b/W decays 
(c-not-from-bW). We do this by checking the particle's ID and its mother's ID.

Step 2: match jets to b quarks
For each b quark, we find the closest jet which has the smallest dR(b, jet). If the dR(b, closest jet) is less than 0.5, 
we say that we find a jet match for this b quark and save the corresponding jet to the list of "jet-matched-to-b".

Step 3: match jets to c-from-bW
For each c-from-bW, we do a similar matching as above. If dR(c, closest jet) is less than 0.5, we say that we find a 
jet match for this c-from-bW and save the corresponding jet to the list of "jetmatched-to-c-from-bW".

Step 4: match jets to c-not-from-bW
For each c-from-bW, we do the same dR matching as in step 3. If we find a match and the matched jet doesn't match 
neither to any b quark(not in "jet-matched-to-b") nor to any c-from-bW(not in "jetmatched-to-c-from-bW"), we save the 
c-not-from-bW to the list of "matched-c-not-from-bW" and the jet to the list of "jet-matched-toc-not-from-bW".

Step 5: count of the number of "matched-c-not-from-bW" and "jetmatched-
bWo-c-not-from-bW" If we find at least one "matched-c-not-from-bW", we call this event
tt+cc.


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Take match between b-hadrons not from top with pT > 5 GeV and  particle jets (truth jets) with dR < 0.4.  If this 
particle jet has pT > 15 GeV and |eta| < 2.5, then the event has an additional b.  If there are two such particle jets, 
matched to two b-hadrons not from top, then the event is labeled "bb".  If two b-hadrons not from top are matched 
to one particle jet, it is labelled "B".

In the fit, all b categories are combined and all c categories are combined.  No split between tt+b and tt+bb are 
explicitly formalized by a NP in the profile likelihood, however, the PS systematics, comparisons of generators and NLO 
systematics allow for the normalization of tt+b and tt+bb to vary.  The CMS-like tretment was also tested and found to 
have very little impact on the measurement.


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In progress...

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<!-- ---++ Group Members and Contributors: Incomplete - please contact us if you want to be included. -->

<!-- OLD LIST - How to update
* Pierre Artoisenet, Theory
* Fabio Cascioli, Theory
* Chris Collins-Tooth, ATLAS - ex-oficio group contact
* Sally Dawson, Theory
* Simon Dean, ATLAS - ex-oficio group contact
* Stefan Dittmaier, Theory
* Rikkert Frederix, Theory
* Maria Vittoria Garzelli, Theory
* Stefan Hoeche, Theory
* Joey Huston, ATLAS
* Adam Kardos, Theory
* Frank Krauss, Theory
* Michael Kraemer, Theory
* Kevin Lannon, CMS
* Philipp Maierhoefer, Theory
* Olivier Mattelaer, Theory
* Niccolo Moretti, Theory
* Jim Olsen, CMS - ex-oficio group contact
* Costas Papadopoulos, Theory
* Chris Potter, ATLAS - ex-oficio group contact
* Stefano Pozzorini, Theory
* Robbert Rietkerk, Theory
* Jennifer Thompson, Theory
* Zoltan Trocsanyi, Theory
* Doreen Wackeroth, Theory -->

<!-- ---++ Available Tools -->

<!-- OLD
* HQQ ( M. Spira):
--> <!-- ---++ Documents -->

<!-- OLD
* Set up for Freiburg exercises
* Set up for CERN mtg results
--> <!-- ---++ Previous Meetings -->

<!-- OLD
* CERN InDico Agenda
* Minutes of informal get-acquainted meeting - 18 Feb 2010
* Minutes from meeting dedicated to preparations for Freiburg - 31 March 2010
* Minutes from meeting dedicated to preparations for CERN meeting - 9 June 2010
* Minutes from meeting of May 4, 2012
--> <!-- ---++ Links -->

<!-- OLD
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Revision 512019-05-02 - LauraReina

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META TOPICPARENT name="LHCHXSWG1"

ttH/tH Higgs Associated Production Process

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Group Contacts

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ttH/tH Mailing List

Revision 502019-04-26 - LauraReina

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META TOPICPARENT name="LHCHXSWG1"
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ttH/tHq Higgs Associated Production Process

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ttH/tH Higgs Associated Production Process

 
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Goals of the group

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The ttH/tH group is a subgroup of the LHC Higgs cross-section working group ( LHCHXSWG TWiki). The ttH/tH subgroup mandate is as follows:
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The ttH/tH subgroup mandate is as follows:
 
  • Based on a review of the current status and ongoing plans of ttH and tH experimental analyses and all relevant theory predictions we will:
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    • Identify and characterize state-of-the art theoretical predictions+tools for signals and backgrounds in all relevant ttH and tH searches
    • Identify all important theory related sources of uncertainties and prioritize them according to their impact on experimental analyses and the likelihood of theory improvements in the near future
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    • Identify and characterize state-of-the art theoretical predictions+tools for signals and backgrounds in all relevant ttH and tH searches.
    • Identify all important theory related sources of uncertainties and prioritize them according to their impact on experimental analyses and the likelihood of theory improvements in the near future.
 
  • In this context we will:
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    • Include associated single-top Higgs searches in the activities of the ttH subgroup
 
    • Give more emphasis to precision theory predictions/simulations for ttH/tH backgrounds.
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    • Address nontrivial aspects of theory uncertainties that play an important role in the ATLAS/CMS analyses (e.g. signal and background shape uncertainties)
    • Try to involve more key experts (experimentalists and theorists) in the ttH subgroup
    • Foster communication between ATLAS and CMS
>
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    • Address nontrivial aspects of theory uncertainties that play an important role in the ATLAS/CMS analyses (e.g. signal and background shape uncertainties).
    • Try to involve more key experts (experimentalists and theorists) in the ttH/tH subgroup.
    • Foster communication between ATLAS and CMS, as well as between the experiments and theorists working on issues of interest to the experiments.
 

Group Contacts

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ttH Mailing List

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ttH/tH Mailing List

 
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Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the lhc-higgs-xsbr-tth mailing list using this link (search for "lhc-higgs-xsbr-tth") or by contacting the conveners.
>
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Public meetings and general announcements regarding the ttH/tH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the lhc-higgs-xsbr-tth mailing list using this link (search for "lhc-higgs-xsbr-tth") or by contacting the conveners.
 
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Meeting Plans for the ttH/tH subgroup (Oct 2014-Nov 2017)

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Meeting Plans for the ttH/tH subgroup (Oct 2014-Present)

  Practical information
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  • Meetings will be announced in the mailing list above.(usually Monday's at 17h).
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  • Meetings will be announced to the mailing list above.
 
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Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of meeting summaries.
<!--These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.-->
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Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of meeting summaries. <!--These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.-->
 
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Date Time Title Indico/Vidyo Summary
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Date Time (CERN) Title Indico/Vidyo Summary
 
Oct 20, 2014 17:00-18:30 Signal modeling in ttH Indico meeting summary
Nov 3, 2014 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico meeting summary
Nov 10, 2014 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico meeting summary
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Oct 22, 2018 14:30-16:00 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
Apr 1, 2019 14:30-16:00 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
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Topical Meetings

 
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Strategy of the Topical Meetings

  • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.
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The activity of the working group entered a new phase in 2014 with a series of topical meetings aimed at:
  • fostering discussions and stronger links between the experimental and theoretical communities, involving the relevant leading experts;
  • discussing the status of (and plans for) ttH and tH searches in various channels, with emphasis on theory related issues and limitations;
  • discussing state-of-the art theory predictions, their present limitations, and possible improvements;
  • identifying and prioritizing all needed theoretical improvements.
 
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  • We thus propose to initiate the activities of the new ttH subgroup by a series of short topical meetings with the following aims:
    • to foster discussions and stronger links between the experimental and theoretical communities, involving the relevant leading experts;
    • to discuss the status of (and plans for) ttH and tH searches in various channels, with emphasis on theory related issues and limitations;
    • to discuss state-of-the art theory predictions, their present limitations, and possible improvements;
    • to identify and prioritize all needed theoretical improvements.

<!--   * As theory issues are often connected to technical aspects of the ttH analyses, we propose to structure this series of topical meetings in a way that guarantees an optimal involvement of the experimental experts that are working on the various analyses. We thus propose: 
    • approximately 8 meetings of max 1.5 h each , to be held on a regular basis in Oct 2014 -- Jan 2015;
    • each meeting will be devoted to a particular ttH or tH analysis channel and include two experimental talks (15min ATLAS + 15min CMS) and a 15min theory talk;
    • the emphasis of experimental talks should be on the employed theory tools, the key sources of theoretical uncertainties, their treatment and their impact in the framework of the experimental analyses;
    • theory talks will review the status of ttH topics that are especially relevant for (but not restricted to) the ttH analysis at hand
-->
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These meetings prepared and paved the activity of the WG in preparation for Run 2, YR4, and beyond.
 
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Modeling studies in ttH and tt+jets in Preparation for Run 2

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Modeling studies in ttH and tt+jets in Preparation for Run 2 (to be collected in YR4)

 
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Plans for YR4

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The results of these studies are collected in the ttH/tH section of YR4.
  ttV recommended cross sections at 13 TeV using fixed scale (mt + mV/2)

Process XS [fb] scale pdf alpha_S
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ttW- 203.2 +13.3% −11.7% ±2.1% ±2.9%
ttW- + ttW+ 600.8 +12.9% -11.5% ±2.0% ±2.7%
Correlation effects are consistently included in the uncertainties of the combined ttW- + ttW+ cross section.
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Monte Carlo studies for background processes during and after Run 2 (post YR4)

Among the important achievements of the ttH/tH working group collected in YR4 are: 1) the succesful comparison of all existing NLO QCD+parton shower Monte Carlo generators for the simulation of the ttH signal, 2) the first comparison of NLO QCD+parton shower Monte Carlo generators for the simulation of the tt+b jets background, and 3) the recommendation of NLO QCD cross sections for ttW and ttZ background processes.

After YR4, the more recent activity of the ttH/tH working group has focused on background Monte Carlo studies:

  • tt+bjets: as documented by the series of meeting in the 2016-2019 period and by the reports presented at the various HXSWG General Assembly Meetings during the same period, this has been the major activity of the WG. Thanks to the collaboration of the Authors of different NLO QCD+parton shower Monte Carlo generators, the comparison is now converging to a substantial agreement which will lead to the possibility of providing the experiments with well-defined recommendations for the use of the corresponding theoretical tools in experimental analyses. A WG note will be completed during 2019. The various stages of this study are documented here:
  • tt+V (V=W/Z)->multileptons: the study of this background is being prepared and will be the next major focus of the WG, with the goal of presenting preliminary results from this activity at the HXSWG General Assembly Meeting in October 2019.
 

Subprocess categorization schemes (Run 1 and Run 2)

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  Here is a handy flowchart for the CMS scheme in Run 1.
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Note:
1. the jets we used are the selected good jets: Pt>30GeV, |eta|<2.4
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 bWo-c-not-from-bW" If we find at least one "matched-c-not-from-bW", we call this event tt+cc.
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Take match between b-hadrons not from top with pT > 5 GeV and  particle jets (truth jets) with dR < 0.4.  If this 
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 systematics allow for the normalization of tt+b and tt+bb to vary. The CMS-like tretment was also tested and found to have very little impact on the measurement.
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In progress...

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<!-- ---++ Group Members and Contributors: Incomplete - please contact us if you want to be included. -->

<!-- OLD LIST - How to update
* Pierre Artoisenet, Theory
* Fabio Cascioli, Theory
* Chris Collins-Tooth, ATLAS - ex-oficio group contact
* Sally Dawson, Theory
* Simon Dean, ATLAS - ex-oficio group contact
* Stefan Dittmaier, Theory
* Rikkert Frederix, Theory
* Maria Vittoria Garzelli, Theory
* Stefan Hoeche, Theory
* Joey Huston, ATLAS
* Adam Kardos, Theory
* Frank Krauss, Theory
* Michael Kraemer, Theory
* Kevin Lannon, CMS
* Philipp Maierhoefer, Theory
* Olivier Mattelaer, Theory
* Niccolo Moretti, Theory
* Jim Olsen, CMS - ex-oficio group contact
* Costas Papadopoulos, Theory
* Chris Potter, ATLAS - ex-oficio group contact
* Stefano Pozzorini, Theory
* Robbert Rietkerk, Theory
* Jennifer Thompson, Theory
* Zoltan Trocsanyi, Theory
* Doreen Wackeroth, Theory -->

<!-- ---++ Available Tools -->

<!-- OLD
* HQQ ( M. Spira):
--> <!-- ---++ Documents -->

<!-- OLD
* Set up for Freiburg exercises
* Set up for CERN mtg results
--> <!-- ---++ Previous Meetings -->

 
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In progress...

<!--/twistyPlugin-->

<!-- ---++ Group Members and Contributors: Incomplete - please contact us if you want to be included. -->

<!-- OLD LIST - How to update  
  • Pierre Artoisenet, Theory
  • Fabio Cascioli, Theory
  • Chris Collins-Tooth, ATLAS - ex-oficio group contact
  • Sally Dawson, Theory
  • Simon Dean, ATLAS - ex-oficio group contact
  • Stefan Dittmaier, Theory
  • Rikkert Frederix, Theory
  • Maria Vittoria Garzelli, Theory
  • Stefan Hoeche, Theory
  • Joey Huston, ATLAS
  • Adam Kardos, Theory
  • Frank Krauss, Theory
  • Michael Kraemer, Theory
  • Kevin Lannon, CMS
  • Philipp Maierhoefer, Theory
  • Olivier Mattelaer, Theory
  • Niccolo Moretti, Theory
  • Jim Olsen, CMS - ex-oficio group contact
  • Costas Papadopoulos, Theory
  • Chris Potter, ATLAS - ex-oficio group contact
  • Stefano Pozzorini, Theory
  • Robbert Rietkerk, Theory
  • Jennifer Thompson, Theory
  • Zoltan Trocsanyi, Theory
  • Doreen Wackeroth, Theory -->

<!-- ---++ Available Tools -->

<!-- OLD 
  • HQQ ( M. Spira):
-->
<!-- ---++ Documents -->

<!-- OLD  
-->
<!-- ---++ Previous Meetings -->

<!-- OLD 
  • CERN InDico Agenda
  • Minutes of informal get-acquainted meeting - 18 Feb 2010
  • Minutes from meeting dedicated to preparations for Freiburg - 31 March 2010
  • Minutes from meeting dedicated to preparations for CERN meeting - 9 June 2010
  • Minutes from meeting of May 4, 2012
-->
<!-- ---++ Links -->
>
>
<!-- OLD
* CERN InDico Agenda
* Minutes of informal get-acquainted meeting - 18 Feb 2010
* Minutes from meeting dedicated to preparations for Freiburg - 31 March 2010
* Minutes from meeting dedicated to preparations for CERN meeting - 9 June 2010
* Minutes from meeting of May 4, 2012
--> <!-- ---++ Links -->
 
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Revision 492019-04-08 - LauraReina

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

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Mar 19, 2018 16:30-18:00 Informal meeting with tt+b jets Monte Carlo's authors Indico  
Apr 16, 2018 16:30-18:00 Informal meeting with tt+b jets Monte Carlo's authors Indico  
Oct 22, 2018 14:30-16:00 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
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Apr 1, 2019 14:30-16:00 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
 

Strategy of the Topical Meetings

  • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.

Revision 482018-11-20 - LauraReina

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

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Feb 6, 2017 17:00-18:30 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
July 6, 2017 17:00-18:30 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
Nov 6, 2017 17:00-18:30 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
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Feb 12, 2018 16:30-18:00 Informal meeting with tt+b jets Monte Carlo's authors Indico  
Mar 5, 2018 16:30-18:00 Informal meeting with tt+b jets Monte Carlo's authors Indico  
Mar 19, 2018 16:30-18:00 Informal meeting with tt+b jets Monte Carlo's authors Indico  
Apr 16, 2018 16:30-18:00 Informal meeting with tt+b jets Monte Carlo's authors Indico  
Oct 22, 2018 14:30-16:00 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
 

Strategy of the Topical Meetings

  • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.

Revision 462017-10-25 - MariaMorenoLlacer

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

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    • Give more emphasis to precision theory predictions/simulations for ttH/tH backgrounds.
    • Address nontrivial aspects of theory uncertainties that play an important role in the ATLAS/CMS analyses (e.g. signal and background shape uncertainties)
    • Try to involve more key experts (experimentalists and theorists) in the ttH subgroup
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    • Foster communication between ATLAS and CMS
 

Group Contacts

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Meeting Plans for the ttH/tH subgroup (Oct 2014-Nov 2017)

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Practical informations
  • Times 17h unless otherwise stated; CERN room and Vidyo coordinates: see Indico links
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Practical information
  • Meetings will be announced in the mailing list above.(usually Monday's at 17h).
 
Changed:
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Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of meeting summaries. These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.
>
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Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of meeting summaries.
<!--These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.-->
 
Date Time Title Indico/Vidyo Summary
Oct 20, 2014 17:00-18:30 Signal modeling in ttH Indico meeting summary
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Feb 2, 2015 16:30-18:00 Backgrounds and uncertainties in tHq Indico  
June 9, 2015 16:30-18:00 Theory update Indico  
Dec 10, 2015 16:30-17:30 Coordination of ttbb simulations Indico  
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May 31, 2016 16:30-18:30 Coordination of ttbb simulations https://indico.cern.ch/event/533976][Indico]]  
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May 31, 2016 16:30-18:30 Coordination of ttbb simulations Indico  
 
Feb 6, 2017 17:00-18:30 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
July 6, 2017 17:00-18:30 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
Nov 6, 2017 17:00-18:30 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
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    • to discuss state-of-the art theory predictions, their present limitations, and possible improvements;
    • to identify and prioritize all needed theoretical improvements.
Changed:
<
<
  • As theory issues are often connected to technical aspects of the ttH analyses, we propose to structure this series of topical meetings in a way that guarantees an optimal involvement of the experimental experts that are working on the various analyses. We thus propose:
>
>
<!--   * As theory issues are often connected to technical aspects of the ttH analyses, we propose to structure this series of topical meetings in a way that guarantees an optimal involvement of the experimental experts that are working on the various analyses. We thus propose:
 
    • approximately 8 meetings of max 1.5 h each , to be held on a regular basis in Oct 2014 -- Jan 2015;
    • each meeting will be devoted to a particular ttH or tH analysis channel and include two experimental talks (15min ATLAS + 15min CMS) and a 15min theory talk;
    • the emphasis of experimental talks should be on the employed theory tools, the key sources of theoretical uncertainties, their treatment and their impact in the framework of the experimental analyses;
Changed:
<
<
    • theory talks will review the status of ttH topics that are especially relevant for (but not restricted to) the ttH analysis at hand.
>
>
 
    • theory talks will review the status of ttH topics that are especially relevant for (but not restricted to) the ttH analysis at hand
-->
 

Modeling studies in ttH and tt+jets in Preparation for Run 2

Revision 452017-10-24 - MariaMorenoLlacer

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

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 The ttH/tH group is a subgroup of the LHC Higgs cross-section working group ( LHCHXSWG TWiki). The ttH/tH subgroup mandate is as follows:

  • Based on a review of the current status and ongoing plans of ttH and tH experimental analyses and all relevant theory predictions we will:
Changed:
<
<
    • Identify and characterise state-of-the art theoretical predictions+tools for signals and backgrounds in all relevant ttH and tH searches
    • Identify all important theory related sources of uncertainties and prioritise them according to their impact on experimental analyses and the likelihood of theory improvements in the near future
>
>
    • Identify and characterize state-of-the art theoretical predictions+tools for signals and backgrounds in all relevant ttH and tH searches
    • Identify all important theory related sources of uncertainties and prioritize them according to their impact on experimental analyses and the likelihood of theory improvements in the near future
 
  • In this context we will:
    • Include associated single-top Higgs searches in the activities of the ttH subgroup
    • Give more emphasis to precision theory predictions/simulations for ttH/tH backgrounds.
Changed:
<
<
    • Address nontrivial aspects of theory uncertainties that play an important role in the ATLAS/CMS analyses (e.g. signal and backgorund shape uncertainties)
>
>
    • Address nontrivial aspects of theory uncertainties that play an important role in the ATLAS/CMS analyses (e.g. signal and background shape uncertainties)
 
    • Try to involve more key experts (experimentalists and theorists) in the ttH subgroup

Group Contacts

Changed:
<
<
>
>
 
Changed:
<
<
>
>
 

ttH Mailing List

Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the lhc-higgs-xsbr-tth mailing list using this link (search for "lhc-higgs-xsbr-tth") or by contacting the conveners.

Changed:
<
<

Meeting Plans for the ttH/tH subgroup (Oct 2014-Feb 2017)

>
>

Meeting Plans for the ttH/tH subgroup (Oct 2014-Nov 2017)

  Practical informations
Changed:
<
<
  • Times 16:30-18:00 unless otherwise stated; CERN room and Vidyo coordinates: see Indico links
>
>
  • Times 17h unless otherwise stated; CERN room and Vidyo coordinates: see Indico links
  Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of meeting summaries. These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.

Date Time Title Indico/Vidyo Summary
Changed:
<
<
Oct 20 17:00-18:30 Signal modeling in ttH Indico meeting summary
Nov 3 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico meeting summary
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico meeting summary
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico meeting summary
Dec 1 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico meeting summary
Jan 12 16:30-18:00 ttH Combination: Systematics and correlations Indico meeting summary
Jan 26 16:30-18:00 Signal modeling in tHq Indico  
Feb 2 16:30-18:00 Backgrounds and uncertainties in tHq Indico  
June 9 16:30-18:00 Theory update Indico  
Dec 10 16:30-17:30 Coordination of ttbb simulations Indico  
Feb 6 17:00-18:30 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico meeting summary
>
>
Oct 20, 2014 17:00-18:30 Signal modeling in ttH Indico meeting summary
Nov 3, 2014 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico meeting summary
Nov 10, 2014 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico meeting summary
Nov 24, 2014 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico meeting summary
Dec 1, 2014 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico meeting summary
Jan 12, 2015 16:30-18:00 ttH Combination: Systematics and correlations Indico meeting summary
Jan 26, 2015 16:30-18:00 Signal modeling in tHq Indico  
Feb 2, 2015 16:30-18:00 Backgrounds and uncertainties in tHq Indico  
June 9, 2015 16:30-18:00 Theory update Indico  
Dec 10, 2015 16:30-17:30 Coordination of ttbb simulations Indico  
May 31, 2016 16:30-18:30 Coordination of ttbb simulations https://indico.cern.ch/event/533976][Indico]]  
Feb 6, 2017 17:00-18:30 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
July 6, 2017 17:00-18:30 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
Nov 6, 2017 17:00-18:30 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico  
 

Strategy of the Topical Meetings

  • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.
Changed:
<
<
  • We thus propose to initiate the activites of the new ttH subgroup by a series of short topical meetings with the following aims:
>
>
  • We thus propose to initiate the activities of the new ttH subgroup by a series of short topical meetings with the following aims:
 
    • to foster discussions and stronger links between the experimental and theoretical communities, involving the relevant leading experts;
    • to discuss the status of (and plans for) ttH and tH searches in various channels, with emphasis on theory related issues and limitations;
    • to discuss state-of-the art theory predictions, their present limitations, and possible improvements;
Changed:
<
<
    • to identify and prioritise all needed theoretical improvements.
>
>
    • to identify and prioritize all needed theoretical improvements.
 
  • As theory issues are often connected to technical aspects of the ttH analyses, we propose to structure this series of topical meetings in a way that guarantees an optimal involvement of the experimental experts that are working on the various analyses. We thus propose:
    • approximately 8 meetings of max 1.5 h each , to be held on a regular basis in Oct 2014 -- Jan 2015;

Revision 442017-05-16 - StefanG

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

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  Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the lhc-higgs-xsbr-tth mailing list using this link (search for "lhc-higgs-xsbr-tth") or by contacting the conveners.
Changed:
<
<

Meeting Plans for the ttH/tH subgroup (Oct 2014-Feb 2015)

>
>

Meeting Plans for the ttH/tH subgroup (Oct 2014-Feb 2017)

  Practical informations
  • Times 16:30-18:00 unless otherwise stated; CERN room and Vidyo coordinates: see Indico links

Revision 432017-05-15 - StefanG

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

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Feb 2 16:30-18:00 Backgrounds and uncertainties in tHq Indico  
June 9 16:30-18:00 Theory update Indico  
Dec 10 16:30-17:30 Coordination of ttbb simulations Indico  
Added:
>
>
Feb 6 17:00-18:30 Common meeting on tt+b-jet backgrounds to ttH(bb) Indico meeting summary
 

Strategy of the Topical Meetings

  • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.

Revision 422016-03-17 - StefanoPozzorini

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

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  ttV recommended cross sections at 13 TeV using fixed scale (mt + mV/2)

Process XS [fb] scale pdf alpha_S
Changed:
<
<
ttZ 839.3 + 9.6% −11.3% ±2.8% ±2.8%
ttW+ 397.6 +12.7% −11.4% ±2.0% ±2.6%
ttW- 203.2 +13.3% −11.7% ±2.1% ±2.9%
>
>
ttZ 839.3 + 9.6% −11.3% ±2.8% ±2.8%
ttW+ 397.6 +12.7% −11.4% ±2.0% ±2.6%
ttW- 203.2 +13.3% −11.7% ±2.1% ±2.9%
ttW- + ttW+ 600.8 +12.9% -11.5% ±2.0% ±2.7%
Correlation effects are consistently included in the uncertainties of the combined ttW- + ttW+ cross section.
 

Subprocess categorization schemes (Run 1 and Run 2)

%TWISTY{mode="div" showlink="CMS categorization prescription in Run 1" hidelink="Hide CMS Run 1 prescription"

Revision 412016-03-16 - StefanG

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

Line: 70 to 70
 

Plans for YR4

Added:
>
>
ttV recommended cross sections at 13 TeV using fixed scale (mt + mV/2)

Process XS [fb] scale pdf alpha_S
ttZ 839.3 + 9.6% −11.3% ±2.8% ±2.8%
ttW+ 397.6 +12.7% −11.4% ±2.0% ±2.6%
ttW- 203.2 +13.3% −11.7% ±2.1% ±2.9%
 

Subprocess categorization schemes (Run 1 and Run 2)

%TWISTY{mode="div" showlink="CMS categorization prescription in Run 1" hidelink="Hide CMS Run 1 prescription"

Revision 402016-01-19 - StefanoPozzorini

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

Revision 392015-12-21 - LauraReina

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

Line: 66 to 66
 

Modeling studies in ttH and tt+jets in Preparation for Run 2

Added:
>
>
 

Plans for YR4

Revision 382015-12-16 - LauraReina

Line: 1 to 1
 
META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

Line: 65 to 65
 

Modeling studies in ttH and tt+jets in Preparation for Run 2

Added:
>
>
 

Plans for YR4

Revision 372015-12-08 - StefanoPozzorini

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

Line: 46 to 46
 
Jan 26 16:30-18:00 Signal modeling in tHq Indico  
Feb 2 16:30-18:00 Backgrounds and uncertainties in tHq Indico  
June 9 16:30-18:00 Theory update Indico  
Changed:
<
<

>
>
Dec 10 16:30-17:30 Coordination of ttbb simulations Indico  
 

Strategy of the Topical Meetings

  • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.

Revision 362015-11-12 - StefanoPozzorini

Line: 1 to 1
 
META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

Line: 45 to 45
 
Jan 12 16:30-18:00 ttH Combination: Systematics and correlations Indico meeting summary
Jan 26 16:30-18:00 Signal modeling in tHq Indico  
Feb 2 16:30-18:00 Backgrounds and uncertainties in tHq Indico  
Added:
>
>
June 9 16:30-18:00 Theory update Indico  

 

Strategy of the Topical Meetings

  • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.

Revision 352015-11-04 - StefanoPozzorini

Line: 1 to 1
 
META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

Line: 65 to 65
 

Plans for YR4

Added:
>
>
 

Subprocess categorization schemes (Run 1 and Run 2)

%TWISTY{mode="div" showlink="CMS categorization prescription in Run 1" hidelink="Hide CMS Run 1 prescription"

Revision 342015-10-30 - StefanoPozzorini

Line: 1 to 1
 
META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

Line: 63 to 63
 

Modeling studies in ttH and tt+jets in Preparation for Run 2

Changed:
<
<

Topics under study

    • In progress...
>
>

Plans for YR4

 

Subprocess categorization schemes (Run 1 and Run 2)

%TWISTY{mode="div" showlink="CMS categorization prescription in Run 1" hidelink="Hide CMS Run 1 prescription"

Revision 332015-06-29 - StefanoPozzorini

Line: 1 to 1
 
META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

Line: 38 to 37
 Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of meeting summaries. These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.

Date Time Title Indico/Vidyo Summary
Changed:
<
<
Oct 20 17:00-18:30 Signal modeling in ttH Indico meeting summary
Nov 3 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico meeting summary
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico meeting summary
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico meeting summary
Dec 1 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico meeting summary
Jan 12 16:30-18:00 ttH Combination: Systematics and correlations Indico meeting summary
>
>
Oct 20 17:00-18:30 Signal modeling in ttH Indico meeting summary
Nov 3 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico meeting summary
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico meeting summary
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico meeting summary
Dec 1 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico meeting summary
Jan 12 16:30-18:00 ttH Combination: Systematics and correlations Indico meeting summary
 
Jan 26 16:30-18:00 Signal modeling in tHq Indico  
Feb 2 16:30-18:00 Backgrounds and uncertainties in tHq Indico  
Line: 63 to 62
 
    • theory talks will review the status of ttH topics that are especially relevant for (but not restricted to) the ttH analysis at hand.

Modeling studies in ttH and tt+jets in Preparation for Run 2

Added:
>
>
 

Topics under study

    • In progress...

Revision 322015-01-20 - ChrisNeu

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

Line: 18 to 18
 
    • Address nontrivial aspects of theory uncertainties that play an important role in the ATLAS/CMS analyses (e.g. signal and backgorund shape uncertainties)
    • Try to involve more key experts (experimentalists and theorists) in the ttH subgroup

Group Contacts

Changed:
<
<
>
>
 
Changed:
<
<
>
>
 
Line: 29 to 30
  Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the lhc-higgs-xsbr-tth mailing list using this link (search for "lhc-higgs-xsbr-tth") or by contacting the conveners.
Changed:
<
<

Meeting Plans for the ttH/tH subgroup (Oct 2014-Jan 2015)

>
>

Meeting Plans for the ttH/tH subgroup (Oct 2014-Feb 2015)

  Practical informations
  • Times 16:30-18:00 unless otherwise stated; CERN room and Vidyo coordinates: see Indico links
Line: 37 to 38
 Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of meeting summaries. These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.

Date Time Title Indico/Vidyo Summary
Changed:
<
<
Oct 20 17:00-18:30 Signal modeling in ttH Indico meeting summary
Nov 3 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico meeting summary
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico meeting summary
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico  
Dec 1 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico  
Jan 12 16:30-18:00 ttH Combination: Systematics and correlations Indico  
>
>
Oct 20 17:00-18:30 Signal modeling in ttH Indico meeting summary
Nov 3 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico meeting summary
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico meeting summary
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico meeting summary
Dec 1 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico meeting summary
Jan 12 16:30-18:00 ttH Combination: Systematics and correlations Indico meeting summary
 
Jan 26 16:30-18:00 Signal modeling in tHq Indico  
Feb 2 16:30-18:00 Backgrounds and uncertainties in tHq Indico  

Revision 312014-12-18 - LauraReina

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

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Date Time Title Indico/Vidyo Summary
Oct 20 17:00-18:30 Signal modeling in ttH Indico meeting summary
Nov 3 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico meeting summary
Changed:
<
<
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico  
>
>
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico meeting summary
 
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico  
Dec 1 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico  
Jan 12 16:30-18:00 ttH Combination: Systematics and correlations Indico  

Revision 302014-12-09 - ChrisNeu

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

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Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico  
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico  
Dec 1 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico  
Changed:
<
<
Dec 15 16:30-18:00 ttH Combination: Systematics and correlations Indico  
Jan 12 16:30-18:00 Signal modeling in tHq Indico  
>
>
Jan 12 16:30-18:00 ttH Combination: Systematics and correlations Indico  
Jan 26 16:30-18:00 Signal modeling in tHq Indico  
 
Feb 2 16:30-18:00 Backgrounds and uncertainties in tHq Indico  

Strategy of the Topical Meetings

Revision 292014-11-25 - StefanoPozzorini

Line: 1 to 1
 
META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

Line: 42 to 42
 
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico  
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico  
Dec 1 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico  
Changed:
<
<
Dec 15 16:30-18:00 Signal modeling in tHq Indico  
Jan 12 16:30-18:00 Backgrounds and uncertainties in tHq    
Feb 2 16:30-18:00 ttH Combination: Systematics and correlations    
>
>
Dec 15 16:30-18:00 ttH Combination: Systematics and correlations Indico  
Jan 12 16:30-18:00 Signal modeling in tHq Indico  
Feb 2 16:30-18:00 Backgrounds and uncertainties in tHq Indico  
 

Strategy of the Topical Meetings

  • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.
Line: 71 to 71
  showimgleft="/twiki/pub/TWiki/TWikiDocGraphics/toggleopen-small.gif" hideimgleft="/twiki/pub/TWiki/TWikiDocGraphics/toggleclose-small.gif"}%
Changed:
<
<
Here is a handy flowchart for the CMS scheme in Run 1.
>
>
Here is a handy flowchart for the CMS scheme in Run 1.
 
Note:
1. the jets we used are the selected good jets: Pt>30GeV, |eta|<2.4

Revision 282014-11-18 - ChrisNeu

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

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  showimgleft="/twiki/pub/TWiki/TWikiDocGraphics/toggleopen-small.gif" hideimgleft="/twiki/pub/TWiki/TWikiDocGraphics/toggleclose-small.gif"}%
Added:
>
>
Here is a handy flowchart for the CMS scheme in Run 1.
 
Note:
1. the jets we used are the selected good jets: Pt>30GeV, |eta|<2.4
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 Categorization of tt+b/bb:

Step 1: identify all the b quarks, b-from-t and b-not-from-t

Changed:
<
<
We go through all the MCparticles in each event, identify all the b quarks that come from top decays (b-from-t), as well as all the b quarks that are not from top decays(b-not-from-t). We do this by checking the particle's ID and its mother's ID.
>
>
We go through all the MCparticles in each event, identify all the b quarks that come from top decays (b-from-t), as well as all the b quarks that are not from top decays(b-not-from-t). We do this by checking the particle's ID and its mother's ID.
  Step 2: match jets to b-from-t
Changed:
<
<
For each b-from-t, we find the closest jet which has the smallest dR(b, jet). If the dR(b, closest jet) is less than 0.5, we say that we find a jet match for this b-from-t and save the corresponding jet to the list of "jet-matched-to-b-from-t".
>
>
For each b-from-t, we find the closest jet which has the smallest dR(b, jet). If the dR(b, closest jet) is less than 0.5, we say that we find a jet match for this b-from-t and save the corresponding jet to the list of "jet-matched-to-b-from-t".
  Step 3: match jets to b-not-from-t
Changed:
<
<
For each b-not-from-t, we do the same dR matching as in step 2. If we find a match and the matched jet doesn't match to any b-from-t(not in "jet-matched-to-b-from-t"), we save the b-not-from-t to the list of "matched-b-not-from-t" and the jet to the list of "jetmatched- to-b-not-from-t".
>
>
For each b-not-from-t, we do the same dR matching as in step 2. If we find a match and the matched jet doesn't match to any b-from-t(not in "jet-matched-to-b-from-t"), we save the b-not-from-t to the list of "matched-b-not-from-t" and the jet to the list of "jetmatched- to-b-not-from-t".
  Step 4: count of the number of "matched-b-not-from-t" and "jetmatched-to-b-not-from-t"
Changed:
<
<
Sometimes two b quarks are mateched to the same jet, so we remove the duplicates in "jet-matched-to-b-not-from-t" before we do the counting. If we only find one "matched-b-not-from-t" which also has a jet match, or we find two "matchedb-not-from-t" but only one "jet-matched-to-b-not-from-t" we call this event tt+b. If we find two "matched-b-not-from-t" and two "jet-matched-to-b-notfrom- t" or we find three or more "matched-b-not-from-t" we call this
>
>
Sometimes two b quarks are mateched to the same jet, so we remove the duplicates in "jet-matched-to-b-not-from-t" before we do the counting. If we only find one "matched-b-not-from-t" which also has a jet match, or we find two "matchedb-not-from-t" but only one "jet-matched-to-b-not-from-t" we call this event tt+b. If we find two "matched-b-not-from-t" and two "jet-matched-to-b-notfrom- t" or we find three or more "matched-b-not-from-t" we call this
 event tt+bb.


Categorization of tt+cc Step 1: identify all the b quarks, and c quarks (c-from-bW and cnot-from-bW)
Changed:
<
<
We go throught all the MCparticles in each event, identify all the b quarks regardless of its origin. We aslo identify all the c quarks that come from b or W decays (c-from-bW), as well as all the c quarks that are not from b/W decays(c-not-from-bW). We do this by checking the particle's ID and its mother's ID.
>
>
We go throught all the MCparticles in each event, identify all the b quarks regardless of its origin. We aslo identify all the c quarks that come from b or W decays (c-from-bW), as well as all the c quarks that are not from b/W decays (c-not-from-bW). We do this by checking the particle's ID and its mother's ID.
  Step 2: match jets to b quarks
Changed:
<
<
For each b quark, we find the closest jet which has the smallest dR(b, jet). If the dR(b, closest jet) is less than 0.5, we say that we find a jet match for this b quark and save the corresponding jet to the list of "jet-matched-to-b".
>
>
For each b quark, we find the closest jet which has the smallest dR(b, jet). If the dR(b, closest jet) is less than 0.5, we say that we find a jet match for this b quark and save the corresponding jet to the list of "jet-matched-to-b".
  Step 3: match jets to c-from-bW
Changed:
<
<
For each c-from-bW, we do a similar matching as above. If dR(c, closest jet) is less than 0.5, we say that we find a jet match for this c-from-bW and save the corresponding jet to the list of "jetmatched-to-c-from-bW".
>
>
For each c-from-bW, we do a similar matching as above. If dR(c, closest jet) is less than 0.5, we say that we find a jet match for this c-from-bW and save the corresponding jet to the list of "jetmatched-to-c-from-bW".
  Step 4: match jets to c-not-from-bW
Changed:
<
<
For each c-from-bW, we do the same dR matching as in step 3. If we find a match and the matched jet doesn't match neither to any b quark(not in "jet-matched-to-b") nor to any c-from-bW(not in "jetmatched-to-c-from-bW"), we save the c-not-from-bW to the list of "matched-c-not-from-bW" and the jet to the list of "jet-matched-toc-not-from-bW".
>
>
For each c-from-bW, we do the same dR matching as in step 3. If we find a match and the matched jet doesn't match neither to any b quark(not in "jet-matched-to-b") nor to any c-from-bW(not in "jetmatched-to-c-from-bW"), we save the c-not-from-bW to the list of "matched-c-not-from-bW" and the jet to the list of "jet-matched-toc-not-from-bW".
  Step 5: count of the number of "matched-c-not-from-bW" and "jetmatched- bWo-c-not-from-bW" If we find at least one "matched-c-not-from-bW", we call this event
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  hideimgleft="/twiki/pub/TWiki/TWikiDocGraphics/toggleclose-small.gif"}%
Changed:
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<
Take match between b-hadrons not from top with pT > 5 GeV and particle jets (truth jets) with dR < 0.4. If this particle jet has pT > 15 GeV and |eta| < 2.5, then the event has an additional ?b?. If there are two such particle jets, matched to two b-hadrons not from top, then the event is labeled ?bb?. If two b-hadrons not from top are matched to one particle jet, it is labelled ?B?.

In the fit, all ?b? categories are combined and all ?c? categories are combined. No split between tt+b and tt+bb are explicitly formalized by a NP in the profile likelihood, however, the PS systematics, comparisons of generators and NLO systematics allow for the normalization of tt+b and tt+bb to vary. The CMS-like tretment was also tested and found to have very little impact on the measurement.

>
>
Take match between b-hadrons not from top with pT > 5 GeV and particle jets (truth jets) with dR < 0.4. If this particle jet has pT > 15 GeV and |eta| < 2.5, then the event has an additional b. If there are two such particle jets, matched to two b-hadrons not from top, then the event is labeled "bb". If two b-hadrons not from top are matched to one particle jet, it is labelled "B".

In the fit, all b categories are combined and all c categories are combined. No split between tt+b and tt+bb are explicitly formalized by a NP in the profile likelihood, however, the PS systematics, comparisons of generators and NLO systematics allow for the normalization of tt+b and tt+bb to vary. The CMS-like tretment was also tested and found to have very little impact on the measurement.

  </>
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META FILEATTACHMENT attachment="minute_tth_18_feb_10.txt" attr="h" comment="" date="1268687212" name="minute_tth_18_feb_10.txt" path="minute_tth_18_feb_10.txt" size="2932" stream="minute_tth_18_feb_10.txt" tmpFilename="/usr/tmp/CGItemp16402" user="neu" version="1"
META FILEATTACHMENT attachment="set_up_tth_freiburg-1.txt" attr="h" comment="" date="1268687468" name="set_up_tth_freiburg-1.txt" path="set_up_tth_freiburg-1.txt" size="4110" stream="set_up_tth_freiburg-1.txt" tmpFilename="/usr/tmp/CGItemp16506" user="neu" version="1"
META FILEATTACHMENT attachment="minutes_tth_31_mar_10.txt" attr="" comment="" date="1270574576" name="minutes_tth_31_mar_10.txt" path="minutes_tth_31_mar_10.txt" size="2605" stream="minutes_tth_31_mar_10.txt" tmpFilename="/usr/tmp/CGItemp16379" user="neu" version="1"
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META FILEATTACHMENT attachment="minutes_tth_09_jun_10.txt" attr="" comment="minutes from 9 June mtg" date="1277933514" name="minutes_tth_09_jun_10.txt" path="minutes_tth_09_jun_10.txt" size="2450" stream="minutes_tth_09_jun_10.txt" tmpFilename="/usr/tmp/CGItemp58943" user="neu" version="1"
META FILEATTACHMENT attachment="set_up_tth_cern.txt" attr="" comment="setup for July 2010 CERN mtg results" date="1277933554" name="set_up_tth_cern.txt" path="set_up_tth_cern.txt" size="3738" stream="set_up_tth_cern.txt" tmpFilename="/usr/tmp/CGItemp59044" user="neu" version="1"
META FILEATTACHMENT attachment="minutes_tth_050412.txt" attr="" comment="minutes from May,4 2012 meeting" date="1336307819" name="minutes_tth_050412.txt" path="minutes_tth_050412.txt" size="1879" stream="minutes_tth_050412.txt" tmpFilename="/usr/tmp/CGItemp17752" user="reina" version="1"
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META FILEATTACHMENT attachment="CMSttXCategorization.pdf" attr="" comment="" date="1416315233" name="CMSttXCategorization.pdf" path="CMSttXCategorization.pdf" size="24990" user="neu" version="1"
 
META TOPICMOVED by="pozzorin" date="1414960422" from="LHCPhysics.LHCHXSWG_LHCHXSWGTTH" to="LHCPhysics.LHCHXSWGTTH"

Revision 272014-11-16 - StefanoPozzorini

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META TOPICPARENT name="LHCHXSWG1"

ttH/tHq Higgs Associated Production Process

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Goals of the group

Changed:
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<
The ttH/tH group is a subgroup of the LHC Higgs cross-section working group (LHCHXSWG TWiki). The ttH/tH subgroup mandate is as follows:
>
>
The ttH/tH group is a subgroup of the LHC Higgs cross-section working group ( LHCHXSWG TWiki). The ttH/tH subgroup mandate is as follows:
 
Deleted:
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  • Based on a review of the current status and ongoing plans of ttH and tH experimental analyses and all relevant theory predictions we will:
    • Identify and characterise state-of-the art theoretical predictions+tools for signals and backgrounds in all relevant ttH and tH searches
    • Identify all important theory related sources of uncertainties and prioritise them according to their impact on experimental analyses and the likelihood of theory improvements in the near future
Changed:
<
<
 
>
>
 
  • In this context we will:
    • Include associated single-top Higgs searches in the activities of the ttH subgroup
    • Give more emphasis to precision theory predictions/simulations for ttH/tH backgrounds.
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Changed:
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<
 
>
>
 
Changed:
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>
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ttH Mailing List

Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the lhc-higgs-xsbr-tth mailing list using this link (search for "lhc-higgs-xsbr-tth") or by contacting the conveners.

Line: 35 to 34
 Practical informations
  • Times 16:30-18:00 unless otherwise stated; CERN room and Vidyo coordinates: see Indico links
  • A link to the WG1 Indico page can be found here: Higgs XS&BR WG Indico Page
Changed:
<
<
Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of  meeting summaries. These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.
>
>
Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of meeting summaries. These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.
 
Deleted:
<
<
 
 
Date Time Title Indico/Vidyo Summary
Changed:
<
<
Oct 20 17:00-18:30 Signal modeling in ttH Indico meeting summary
Nov 3 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico  
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico  
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico  
Dec 1 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico  
Dec 15 16:30-18:00 Signal modeling in tHq Indico  
Jan 12 16:30-18:00 Backgrounds and uncertainties in tHq    
Feb 2 16:30-18:00 ttH Combination: Systematics and correlations    
>
>
Oct 20 17:00-18:30 Signal modeling in ttH Indico meeting summary
Nov 3 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico meeting summary
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico  
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico  
Dec 1 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico  
Dec 15 16:30-18:00 Signal modeling in tHq Indico  
Jan 12 16:30-18:00 Backgrounds and uncertainties in tHq    
Feb 2 16:30-18:00 ttH Combination: Systematics and correlations    
 
Deleted:
<
<
 
 

Strategy of the Topical Meetings

  • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.
Changed:
<
<
 
>
>
 
  • We thus propose to initiate the activites of the new ttH subgroup by a series of short topical meetings with the following aims:
    • to foster discussions and stronger links between the experimental and theoretical communities, involving the relevant leading experts;
    • to discuss the status of (and plans for) ttH and tH searches in various channels, with emphasis on theory related issues and limitations;
    • to discuss state-of-the art theory predictions, their present limitations, and possible improvements;
    • to identify and prioritise all needed theoretical improvements.
Changed:
<
<
 
>
>
 
  • As theory issues are often connected to technical aspects of the ttH analyses, we propose to structure this series of topical meetings in a way that guarantees an optimal involvement of the experimental experts that are working on the various analyses. We thus propose:
    • approximately 8 meetings of max 1.5 h each , to be held on a regular basis in Oct 2014 -- Jan 2015;
    • each meeting will be devoted to a particular ttH or tH analysis channel and include two experimental talks (15min ATLAS + 15min CMS) and a 15min theory talk;
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Modeling studies in ttH and tt+jets in Preparation for Run 2

Topics under study

Added:
>
>
 
    • In progress...

Subprocess categorization schemes (Run 1 and Run 2)

Added:
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>
 
<!--/twistyPlugin twikiMakeVisibleInline-->
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  Step 5: count of the number of "matched-c-not-from-bW" and "jetmatched- bWo-c-not-from-bW" If we find at least one "matched-c-not-from-bW", we call this event
Changed:
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tt+cc.
>
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tt+cc.
 
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%TWISTY{mode="div" showlink="ATLAS categorization prescription in Run 1" hidelink="Hide ATLAS Run 1 prescription"

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Added:
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Changed:
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<
Take match between b-hadrons not from top with pT > 5 GeV and particle jets (truth jets) with dR < 0.4. If this particle jet has pT > 15 GeV and |eta| < 2.5, then the event has an additional “b”. If there are two such particle jets, matched to two b-hadrons not from top, then the event is labeled “bb”. If two b-hadrons not from top are matched to one particle jet, it is labelled “B”.
>
>
Take match between b-hadrons not from top with pT > 5 GeV and particle jets (truth jets) with dR < 0.4. If this particle jet has pT > 15 GeV and |eta| < 2.5, then the event has an additional ?b?. If there are two such particle jets, matched to two b-hadrons not from top, then the event is labeled ?bb?. If two b-hadrons not from top are matched to one particle jet, it is labelled ?B?.

In the fit, all ?b? categories are combined and all ?c? categories are combined. No split between tt+b and tt+bb are explicitly formalized by a NP in the profile likelihood, however, the PS systematics, comparisons of generators and NLO systematics allow for the normalization of tt+b and tt+bb to vary. The CMS-like tretment was also tested and found to have very little impact on the measurement.

 
Deleted:
<
<
In the fit, all “b” categories are combined and all “c” categories are combined. No split between tt+b and tt+bb are explicitly formalized by a NP in the profile likelihood, however, the PS systematics, comparisons of generators and NLO systematics allow for the normalization of tt+b and tt+bb to vary. The CMS-like tretment was also tested and found to have very little impact on the measurement.
 
<!--/twistyPlugin-->

%TWISTY{mode="div" showlink="CMS proposal for Run 2" hidelink="Hide CMS Run 2 proposal"

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  • Zoltan Trocsanyi, Theory
  • Doreen Wackeroth, Theory -->
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<!-- ---++ Available Tools -->

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Revision 262014-11-16 - ChrisNeu

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META TOPICPARENT name="LHCHXSWG1"
Changed:
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<

ttH Higgs Associated Production Process

Goals of the group:

>
>

ttH/tHq Higgs Associated Production Process

 
Changed:
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<
<!--   * To understand the modeling of the ttH and tH processes for use in LHC low mass Higgs searches.  
  • To explore techniques for modeling the important backgrounds in ttH and tH searches
  • To understand the specific needs of ttH and tH analyses -->
>
>

Goals of the group

  The ttH/tH group is a subgroup of the LHC Higgs cross-section working group (LHCHXSWG TWiki). The ttH/tH subgroup mandate is as follows:
Line: 19 to 18
 
    • Give more emphasis to precision theory predictions/simulations for ttH/tH backgrounds.
    • Address nontrivial aspects of theory uncertainties that play an important role in the ATLAS/CMS analyses (e.g. signal and backgorund shape uncertainties)
    • Try to involve more key experts (experimentalists and theorists) in the ttH subgroup
Changed:
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Group Contacts:

>
>

Group Contacts

 
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Changed:
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ttH Mailing List:

>
>

ttH Mailing List

  Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the lhc-higgs-xsbr-tth mailing list using this link (search for "lhc-higgs-xsbr-tth") or by contacting the conveners.
Added:
>
>
 

Meeting Plans for the ttH/tH subgroup (Oct 2014-Jan 2015)

Practical informations

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    • to identify and prioritise all needed theoretical improvements.
 
  • As theory issues are often connected to technical aspects of the ttH analyses, we propose to structure this series of topical meetings in a way that guarantees an optimal involvement of the experimental experts that are working on the various analyses. We thus propose:
Changed:
<
<
    • approximately 8 meetings of max 1.5 h each , to be held on a weekly basis in Oct/Nov 2014;
    • each meeting will be devoted to a particular ttH or tH analysis channel and include two experimental talks (15Â’ ATLAS + 15Â’ CMS) and a 15Â’ theory talk;
>
>
    • approximately 8 meetings of max 1.5 h each , to be held on a regular basis in Oct 2014 -- Jan 2015;
    • each meeting will be devoted to a particular ttH or tH analysis channel and include two experimental talks (15min ATLAS + 15min CMS) and a 15min theory talk;
 
    • the emphasis of experimental talks should be on the employed theory tools, the key sources of theoretical uncertainties, their treatment and their impact in the framework of the experimental analyses;
    • theory talks will review the status of ttH topics that are especially relevant for (but not restricted to) the ttH analysis at hand.

Modeling studies in ttH and tt+jets in Preparation for Run 2

Changed:
<
<

Topics under study:

Subprocess categorization schemes:

  • Run 1 CMS:
  • Run 1 ATLAS:
  • Proposal for Run 2:
>
>

Topics under study

    • In progress...

Subprocess categorization schemes (Run 1 and Run 2)

<!--/twistyPlugin twikiMakeVisibleInline-->
Note:
1. the jets we used are the selected good jets: Pt>30GeV, |eta|<2.4
2. all the b and c quarks in the MCparticles need to be final state particles and come after top and anti-top in the chain
--------------

Categorization of tt+b/bb:

Step 1: identify all the b quarks, b-from-t and b-not-from-t 
We go through all the MCparticles in each event, identify all the b quarks that come from top decays (b-from-t), as well as all the b quarks that are not from top decays(b-not-from-t). We do this by checking the particle's ID and its mother's ID.

Step 2: match jets to b-from-t
For each b-from-t, we find the closest jet which has the smallest dR(b, jet). If the dR(b, closest jet) is less than 0.5, we say that we find a jet match for this b-from-t and save the corresponding jet to the list of "jet-matched-to-b-from-t".

Step 3: match jets to b-not-from-t
For each b-not-from-t, we do the same dR matching as in step 2. If we find a match and the matched jet doesn't match to any b-from-t(not in "jet-matched-to-b-from-t"), we save the b-not-from-t to the list of "matched-b-not-from-t" and the jet to the list of "jetmatched- to-b-not-from-t".

Step 4: count of the number of "matched-b-not-from-t" and "jetmatched-to-b-not-from-t"
Sometimes two b quarks are mateched to the same jet, so we remove the duplicates in "jet-matched-to-b-not-from-t" before we do the counting. If we only find one "matched-b-not-from-t" which also has a jet match, or we find two "matchedb-not-from-t" but only one "jet-matched-to-b-not-from-t" we call this event tt+b. If we find two "matched-b-not-from-t" and two "jet-matched-to-b-notfrom- t" or we find three or more "matched-b-not-from-t" we call this
event tt+bb.

--------------
Categorization of tt+cc
Step 1: identify all the b quarks, and c quarks (c-from-bW and cnot-from-bW)
We go throught all the MCparticles in each event, identify all the b quarks regardless of its origin. We aslo identify all the c quarks that come from b or W decays (c-from-bW), as well as all the c
quarks that are not from b/W decays(c-not-from-bW). We do this by checking the particle's ID and its mother's ID.

Step 2: match jets to b quarks
For each b quark, we find the closest jet which has the smallest dR(b, jet). If the dR(b, closest jet) is less than 0.5, we say that we find a jet match for this b quark and save the corresponding jet to the list of "jet-matched-to-b".

Step 3: match jets to c-from-bW
For each c-from-bW, we do a similar matching as above. If dR(c, closest jet) is less than 0.5, we say that we find a jet match for this c-from-bW and save the corresponding jet to the list of "jetmatched-to-c-from-bW".

Step 4: match jets to c-not-from-bW
For each c-from-bW, we do the same dR matching as in step 3. If we find a match and the matched jet doesn't match neither to any b quark(not in "jet-matched-to-b") nor to any c-from-bW(not in "jetmatched-to-c-from-bW"), we save the c-not-from-bW to the list of
"matched-c-not-from-bW" and the jet to the list of "jet-matched-toc-not-from-bW".

Step 5: count of the number of "matched-c-not-from-bW" and "jetmatched-
bWo-c-not-from-bW" If we find at least one "matched-c-not-from-bW", we call this event
tt+cc.
<!--/twistyPlugin-->

<!--/twistyPlugin twikiMakeVisibleInline-->
Take match between b-hadrons not from top with pT > 5 GeV and  particle jets (truth jets) with dR < 0.4.  If this particle jet has pT > 15 GeV and |eta| < 2.5, then the event has an additional “b”.  If there are two such particle jets, matched to two b-hadrons not from top, then the event is labeled “bb”.  If two b-hadrons not from top are matched to one particle jet, it is labelled “B”.

In the fit, all “b” categories are combined and all “c” categories are combined.  No split between tt+b and tt+bb are explicitly formalized by a NP in the profile likelihood, however, the PS systematics, comparisons of generators and NLO systematics allow for the normalization of tt+b and tt+bb to vary.  The CMS-like tretment was also tested and found to have very little impact on the measurement.
<!--/twistyPlugin-->

<!--/twistyPlugin twikiMakeVisibleInline-->

In progress...

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<!-- ---++ Group Members and Contributors: Incomplete - please contact us if you want to be included. -->
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Available Tools

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Documents

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Previous Meetings

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  • Minutes from meeting dedicated to preparations for CERN meeting - 9 June 2010
  • Minutes from meeting of May 4, 2012
-->
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Links

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<!--   OLD
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Revision 252014-11-10 - ChrisNeu

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META TOPICPARENT name="LHCHXSWG1"

ttH Higgs Associated Production Process

Goals of the group:

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    • each meeting will be devoted to a particular ttH or tH analysis channel and include two experimental talks (15Â’ ATLAS + 15Â’ CMS) and a 15Â’ theory talk;
    • the emphasis of experimental talks should be on the employed theory tools, the key sources of theoretical uncertainties, their treatment and their impact in the framework of the experimental analyses;
    • theory talks will review the status of ttH topics that are especially relevant for (but not restricted to) the ttH analysis at hand.
Changed:
<
<

Group Members and Contributors: Incomplete - please contact us if you want to be included.

>
>

Modeling studies in ttH and tt+jets in Preparation for Run 2

Topics under study:

Subprocess categorization schemes:

  • Run 1 CMS:
  • Run 1 ATLAS:
  • Proposal for Run 2:

<!-- ---++ Group Members and Contributors: Incomplete - please contact us if you want to be included. -->
 
<!-- OLD LIST - How to update  
  • Pierre Artoisenet, Theory

Revision 242014-11-04 - StefanoPozzorini

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META TOPICPARENT name="LHCHXSWG1"

ttH Higgs Associated Production Process

Goals of the group:

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ttH Mailing List:

Changed:
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Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the tth-hxswg mailing list using this link (search for "lhc-higgs-xsbr-tth") or by contacting the conveners.
>
>
Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the lhc-higgs-xsbr-tth mailing list using this link (search for "lhc-higgs-xsbr-tth") or by contacting the conveners.
 

Meeting Plans for the ttH/tH subgroup (Oct 2014-Jan 2015)

Practical informations

Revision 232014-11-04 - ReiTanaka

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META TOPICPARENT name="LHCHXSWG1"

ttH Higgs Associated Production Process

Goals of the group:

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 Practical informations
  • Times 16:30-18:00 unless otherwise stated; CERN room and Vidyo coordinates: see Indico links
  • A link to the WG1 Indico page can be found here: Higgs XS&BR WG Indico Page
Changed:
<
<
Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of  meeting summaries. These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.
>
>
Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of  meeting summaries. These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.
   
Date Time Title Indico/Vidyo Summary
Changed:
<
<
Oct 20 17:00-18:30 Signal modeling in ttH Indico meeting summary
>
>
Oct 20 17:00-18:30 Signal modeling in ttH Indico meeting summary
 
Nov 3 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico  
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico  
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico  

Revision 222014-11-03 - ReiTanaka

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META TOPICPARENT name="LHCHXSWG"
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ttH Higgs Associated Production Process

Goals of the group:

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ttH Higgs Associated Production Process

Goals of the group:

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ttH Higgs Associated Production Process

Goals of the group:

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Documents

<!-- OLD
Changed:
<
<
>
>
 
-->

Previous Meetings

<!-- OLD  
Changed:
<
<
  • Minutes of informal get-acquainted meeting - 18 Feb 2010
  • Minutes from meeting dedicated to preparations for Freiburg - 31 March 2010
  • Minutes from meeting dedicated to preparations for CERN meeting - 9 June 2010
  • Minutes from meeting of May 4, 2012
>
>
  • Minutes of informal get-acquainted meeting - 18 Feb 2010
  • Minutes from meeting dedicated to preparations for Freiburg - 31 March 2010
  • Minutes from meeting dedicated to preparations for CERN meeting - 9 June 2010
  • Minutes from meeting of May 4, 2012
 
-->

Links

Line: 131 to 131
 
META FILEATTACHMENT attachment="minutes_tth_09_jun_10.txt" attr="" comment="minutes from 9 June mtg" date="1277933514" name="minutes_tth_09_jun_10.txt" path="minutes_tth_09_jun_10.txt" size="2450" stream="minutes_tth_09_jun_10.txt" tmpFilename="/usr/tmp/CGItemp58943" user="neu" version="1"
META FILEATTACHMENT attachment="set_up_tth_cern.txt" attr="" comment="setup for July 2010 CERN mtg results" date="1277933554" name="set_up_tth_cern.txt" path="set_up_tth_cern.txt" size="3738" stream="set_up_tth_cern.txt" tmpFilename="/usr/tmp/CGItemp59044" user="neu" version="1"
META FILEATTACHMENT attachment="minutes_tth_050412.txt" attr="" comment="minutes from May,4 2012 meeting" date="1336307819" name="minutes_tth_050412.txt" path="minutes_tth_050412.txt" size="1879" stream="minutes_tth_050412.txt" tmpFilename="/usr/tmp/CGItemp17752" user="reina" version="1"
Changed:
<
<
META TOPICMOVED by="tanaka" date="1265556563" from="LHCPhysics.HiggsTTH" to="LHCPhysics.TTH"
>
>
META TOPICMOVED by="pozzorin" date="1414960422" from="LHCPhysics.LHCHXSWG_LHCHXSWGTTH" to="LHCPhysics.LHCHXSWGTTH"

Revision 192014-11-02 - StefanoPozzorini

Line: 1 to 1
 
META TOPICPARENT name="CrossSections"

ttH Higgs Associated Production Process

Goals of the group:

Line: 29 to 29
  

ttH Mailing List:

Changed:
<
<
Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the tth-hxswg mailing list using this link (search for "tth-hxswg") or by contacting the conveners.
>
>
Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the tth-hxswg mailing list using this link (search for "lhc-higgs-xsbr-tth") or by contacting the conveners.
 

Meeting Plans for the ttH/tH subgroup (Oct 2014-Jan 2015)

Practical informations

Revision 182014-10-27 - StefanoPozzorini

Line: 1 to 1
 
META TOPICPARENT name="CrossSections"

ttH Higgs Associated Production Process

Goals of the group:

Line: 30 to 30
 

ttH Mailing List:

Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the tth-hxswg mailing list using this link (search for "tth-hxswg") or by contacting the conveners.

Changed:
<
<

Meeting Plans for the ttH/tH subgroup

>
>

Meeting Plans for the ttH/tH subgroup (Oct 2014-Jan 2015)

 
Changed:
<
<
PRELIMINARY

Times 16:30-18:00 unless otherwise stated (Room t.b.c.)

>
>
Practical informations
  • Times 16:30-18:00 unless otherwise stated; CERN room and Vidyo coordinates: see Indico links
  • A link to the WG1 Indico page can be found here: Higgs XS&BR WG Indico Page
Summaries of topical meetings: important aspects and open issues that should be pursued within the framework of the HXSWG will be collected after each meeting in the form of  meeting summaries. These summaries will serve as a basis for a preliminary working group report (Jan 2015). They will be continuously updated by the ttH conveners, including input and feedback from the whole ttH group.
   
Changed:
<
<
>
>
Date Time Title Indico/Vidyo Summary
Oct 20 17:00-18:30 Signal modeling in ttH Indico meeting summary
Nov 3 16:30-18:00 Backgrounds and uncertainties in experimental ttH, H-->bb searches Indico  
Nov 10 16:30-18:00 Theory perspectives on tt+jets and tt+HF production Indico  
Nov 24 16:30-18:00 Backgrounds and uncertainties in ttH, H-->gamma gamma Indico  
Dec 1 16:30-18:00 Backgrounds and uncertainties in ttH, H-->multileptons Indico  
Dec 15 16:30-18:00 Signal modeling in tHq Indico  
Jan 12 16:30-18:00 Backgrounds and uncertainties in tHq    
Feb 2 16:30-18:00 ttH Combination: Systematics and correlations    
  
Deleted:
<
<
  • Oct 20 : Signal modeling in ttH (Meeting starting at 17:00). See TthMeetingsSummary Indico
  • Nov 3 : Backgrounds and uncertainties in experimental ttH, H-->bb searches. See Indico
  • Nov 10 : Theory perspectives on tt+jets and tt+HF production. See Indico
  • Nov 24 : Backgrounds and uncertainties in ttH, H-->gamma gamma. See Indico
  • Dec 1 : Backgrounds and uncertainties in ttH, H-->multileptons. See Indico
  • Dec 15 : Signal modeling in tHq. See Indico
  • Jan 12 : Backgrounds and uncertainties in tHq. See [[][Indico]]
  • Feb 2 : ttH Combination: Systematics and correlations. See [[][Indico]]
 

Strategy of the Topical Meetings

  • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.
 

Revision 172014-10-27 - StefanoPozzorini

Line: 1 to 1
 
META TOPICPARENT name="CrossSections"

ttH Higgs Associated Production Process

Goals of the group:

Line: 39 to 39
    
Changed:
<
<
  • Oct 20 : Signal modeling in ttH (Meeting starting at 17:00). See Indico
>
>
 
  • Nov 3 : Backgrounds and uncertainties in experimental ttH, H-->bb searches. See Indico
  • Nov 10 : Theory perspectives on tt+jets and tt+HF production. See Indico
  • Nov 24 : Backgrounds and uncertainties in ttH, H-->gamma gamma. See Indico

Revision 162014-10-14 - StefanoPozzorini

Line: 1 to 1
 
META TOPICPARENT name="CrossSections"

ttH Higgs Associated Production Process

Goals of the group:

Line: 39 to 39
    
Changed:
<
<
  • Oct 20 : Signal modeling in ttH (Meeting starting at 17:00)
  • Nov 3 : Backgrounds and uncertainties in experimental ttH, H-->bb searches
  • Nov 10 : Theory perspectives on tt+jets and tt+HF production
  • Nov 24 : Backgrounds and uncertainties in ttH, H-->γγ
  • Dec 1 : Backgrounds and uncertainties in ttH, H-->multileptons
  • Dec 15 : Signal modeling in tHq
  • Jan 12 : Backgrounds and uncertainties in tHq
  • Feb 2 : ttH Combination: Systematics and correlations
>
>
  • Oct 20 : Signal modeling in ttH (Meeting starting at 17:00). See Indico
  • Nov 3 : Backgrounds and uncertainties in experimental ttH, H-->bb searches. See Indico
  • Nov 10 : Theory perspectives on tt+jets and tt+HF production. See Indico
  • Nov 24 : Backgrounds and uncertainties in ttH, H-->gamma gamma. See Indico
  • Dec 1 : Backgrounds and uncertainties in ttH, H-->multileptons. See Indico
  • Dec 15 : Signal modeling in tHq. See Indico
  • Jan 12 : Backgrounds and uncertainties in tHq. See [[][Indico]]
  • Feb 2 : ttH Combination: Systematics and correlations. See [[][Indico]]
 

Strategy of the Topical Meetings

  • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.
 

Revision 152014-10-13 - StefanoPozzorini

Line: 1 to 1
 
META TOPICPARENT name="CrossSections"

ttH Higgs Associated Production Process

Goals of the group:

Line: 29 to 29
  

ttH Mailing List:

Changed:
<
<
Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the tth-hxswg mailing list using this link or by contacting the conveners.
>
>
Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the tth-hxswg mailing list using this link (search for "tth-hxswg") or by contacting the conveners.
 

Meeting Plans for the ttH/tH subgroup

PRELIMINARY

Revision 142014-10-13 - ChrisNeu

Line: 1 to 1
 
META TOPICPARENT name="CrossSections"

ttH Higgs Associated Production Process

Goals of the group:

Line: 29 to 29
  

ttH Mailing List:

Changed:
<
<
Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the tth-xswg mailing list using this link or by contacting the conveners.
>
>
Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the tth-hxswg mailing list using this link or by contacting the conveners.
 

Meeting Plans for the ttH/tH subgroup

PRELIMINARY

Revision 132014-10-13 - StefanoPozzorini

Line: 1 to 1
 
META TOPICPARENT name="CrossSections"

ttH Higgs Associated Production Process

Deleted:
<
<
 

Goals of the group:

Added:
>
>
 
<!--   * To understand the modeling of the ttH and tH processes for use in LHC low mass Higgs searches.  
  • To explore techniques for modeling the important backgrounds in ttH and tH searches
  • To understand the specific needs of ttH and tH analyses -->
Line: 9 to 9
  The ttH/tH group is a subgroup of the LHC Higgs cross-section working group (LHCHXSWG TWiki). The ttH/tH subgroup mandate is as follows:
Added:
>
>
 
 
  • Based on a review of the current status and ongoing plans of ttH and tH experimental analyses and all relevant theory predictions we will:
    • Identify and characterise state-of-the art theoretical predictions+tools for signals and backgrounds in all relevant ttH and tH searches
    • Identify all important theory related sources of uncertainties and prioritise them according to their impact on experimental analyses and the likelihood of theory improvements in the near future
Changed:
<
<
>
>
 
 
  • In this context we will:
    • Include associated single-top Higgs searches in the activities of the ttH subgroup
    • Give more emphasis to precision theory predictions/simulations for ttH/tH backgrounds.
Line: 23 to 23
 
Changed:
<
<
>
>
 
 
Added:
>
>
 

ttH Mailing List:

 
Added:
>
>
Public meetings and general announcements regarding the ttH subgroup will be communicated through the mailing list of WG1. Anybody who is interested in following or contributing to the ttH activities is invited to subscribe to the tth-xswg mailing list using this link or by contacting the conveners.
 

Meeting Plans for the ttH/tH subgroup

Changed:
<
<
PRELIMINARY
>
>
PRELIMINARY
  Times 16:30-18:00 unless otherwise stated (Room t.b.c.)
Added:
>
>
 
 
Changed:
<
<
 
  • Oct 20 : Signal modeling in ttH (Meeting starting at 17:00)
  • Nov 3 : Backgrounds and uncertainties in experimental ttH, H-->bb searches
  • Nov 10 : Theory perspectives on tt+jets and tt+HF production
  • Nov 24 : Backgrounds and uncertainties in ttH, H-->
γγ
  • Dec 1 : Backgrounds and uncertainties in ttH, H-->multileptons
  • Dec 15 : Signal modeling in tHq
  • Jan 12 : Backgrounds and uncertainties in tHq
  • Feb 2 : ttH Combination: Systematics and correlations
  • >
    >
     
    • Oct 20 : Signal modeling in ttH (Meeting starting at 17:00)
    • Nov 3 : Backgrounds and uncertainties in experimental ttH, H-->bb searches
    • Nov 10 : Theory perspectives on tt+jets and tt+HF production
    • Nov 24 : Backgrounds and uncertainties in ttH, H-->γγ
    • Dec 1 : Backgrounds and uncertainties in ttH, H-->multileptons
    • Dec 15 : Signal modeling in tHq
    • Jan 12 : Backgrounds and uncertainties in tHq
    • Feb 2 : ttH Combination: Systematics and correlations
     

    Strategy of the Topical Meetings

    • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.
    Changed:
    <
    <
    >
    >
     
     
    • We thus propose to initiate the activites of the new ttH subgroup by a series of short topical meetings with the following aims:
      • to foster discussions and stronger links between the experimental and theoretical communities, involving the relevant leading experts;
      • to discuss the status of (and plans for) ttH and tH searches in various channels, with emphasis on theory related issues and limitations;
      • to discuss state-of-the art theory predictions, their present limitations, and possible improvements;
      • to identify and prioritise all needed theoretical improvements.
    Changed:
    <
    <
    >
    >
     
     
    • As theory issues are often connected to technical aspects of the ttH analyses, we propose to structure this series of topical meetings in a way that guarantees an optimal involvement of the experimental experts that are working on the various analyses. We thus propose:
      • approximately 8 meetings of max 1.5 h each , to be held on a weekly basis in Oct/Nov 2014;
    Changed:
    <
    <
      • each meeting will be devoted to a particular ttH or tH analysis channel and include two experimental talks (15’ ATLAS + 15’ CMS) and a 15’ theory talk;
    >
    >
      • each meeting will be devoted to a particular ttH or tH analysis channel and include two experimental talks (15Â’ ATLAS + 15Â’ CMS) and a 15Â’ theory talk;
     
      • the emphasis of experimental talks should be on the employed theory tools, the key sources of theoretical uncertainties, their treatment and their impact in the framework of the experimental analyses;
      • theory talks will review the status of ttH topics that are especially relevant for (but not restricted to) the ttH analysis at hand.
    Deleted:
    <
    <
     

    Group Members and Contributors: Incomplete - please contact us if you want to be included.

    Added:
    >
    >
     
    <!-- OLD LIST - How to update  
    • Pierre Artoisenet, Theory
    • Fabio Cascioli, Theory
    Line: 86 to 90
     
     
    • Zoltan Trocsanyi, Theory
    • Doreen Wackeroth, Theory -->

    Added:
    >
    >
     
     
    Changed:
    <
    <
    >
    >
     
     

    Available Tools

    <!-- OLD

    Revision 122014-10-13 - StefanG

    Line: 1 to 1
     
    META TOPICPARENT name="CrossSections"

    ttH Higgs Associated Production Process

    Line: 89 to 89
     

    Available Tools

    Added:
    >
    >
    <!-- OLD
     
    • HQQ ( M. Spira):
    Added:
    >
    >
    -->
     

    Documents

    Added:
    >
    >
    <!-- OLD
     
    Added:
    >
    >
    -->
     

    Previous Meetings

    Added:
    >
    >
    <!-- OLD
     
    • CERN InDico Agenda
    • Minutes of informal get-acquainted meeting - 18 Feb 2010
    • Minutes from meeting dedicated to preparations for Freiburg - 31 March 2010
    • Minutes from meeting dedicated to preparations for CERN meeting - 9 June 2010
    • Minutes from meeting of May 4, 2012
    Added:
    >
    >
    -->
     

    Links

    Changed:
    <
    <
    <!--   * minute_tth_18_feb_10.txt: minute_tth_18_feb_10.txt -->
    <!--   * set_up_tth_freiburg-1.txt: set_up_tth_freiburg-1.txt -->
    >
    >
    <!--   OLD
    * minute_tth_18_feb_10.txt: minute_tth_18_feb_10.txt -->
    <!--   * set_up_tth_freiburg-1.txt: set_up_tth_freiburg-1.txt -->
     
    <!--   * minutes_tth_09_jun_10.txt: minutes from 9 June mtg -->

    Revision 112014-10-08 - StefanG

    Line: 1 to 1
     
    META TOPICPARENT name="CrossSections"

    ttH Higgs Associated Production Process

    Goals of the group:

    Changed:
    <
    <
    • To understand the modeling of the ttH and tH processes for use in LHC low mass Higgs searches.
    >
    >
    <!--   * To understand the modeling of the ttH and tH processes for use in LHC low mass Higgs searches. 
     
    • To explore techniques for modeling the important backgrounds in ttH and tH searches
    Changed:
    <
    <
    • To understand the specific needs of ttH and tH analyses
    >
    >
     
    • To understand the specific needs of ttH and tH analyses -->

    The ttH/tH group is a subgroup of the LHC Higgs cross-section working group (LHCHXSWG TWiki). The ttH/tH subgroup mandate is as follows:

    • Based on a review of the current status and ongoing plans of ttH and tH experimental analyses and all relevant theory predictions we will:
      • Identify and characterise state-of-the art theoretical predictions+tools for signals and backgrounds in all relevant ttH and tH searches
      • Identify all important theory related sources of uncertainties and prioritise them according to their impact on experimental analyses and the likelihood of theory improvements in the near future

    • In this context we will:
      • Include associated single-top Higgs searches in the activities of the ttH subgroup
      • Give more emphasis to precision theory predictions/simulations for ttH/tH backgrounds.
      • Address nontrivial aspects of theory uncertainties that play an important role in the ATLAS/CMS analyses (e.g. signal and backgorund shape uncertainties)
      • Try to involve more key experts (experimentalists and theorists) in the ttH subgroup
     

    Group Contacts:

    Changed:
    <
    <
    • Aurelio Juste, Peter Onyisi - ATLAS
    • Chris Neu, Andrea Rizzi - CMS
    • Laura Reina - Theory
    • Michael Spira - Theory
    >
    >
      
    

    Meeting Plans for the ttH/tH subgroup

    PRELIMINARY

    Times 16:30-18:00 unless otherwise stated (Room t.b.c.)

    • Oct 20 : Signal modeling in ttH (Meeting starting at 17:00)
    • Nov 3 : Backgrounds and uncertainties in experimental ttH, H-->bb searches
    • Nov 10 : Theory perspectives on tt+jets and tt+HF production
    • Nov 24 : Backgrounds and uncertainties in ttH, H-->
    γγ
  • Dec 1 : Backgrounds and uncertainties in ttH, H-->multileptons
  • Dec 15 : Signal modeling in tHq
  • Jan 12 : Backgrounds and uncertainties in tHq
  • Feb 2 : ttH Combination: Systematics and correlations
  • Strategy of the Topical Meetings

    • ttH and tH searches involve specific challenges that call for a very close interaction between the experimental and theoretical communities, such as the very high level of background contamination and the critical role of theory uncertainties in the specific framework of experimental analysis techniques that are used to constrain the backgrounds.

    • We thus propose to initiate the activites of the new ttH subgroup by a series of short topical meetings with the following aims:
      • to foster discussions and stronger links between the experimental and theoretical communities, involving the relevant leading experts;
      • to discuss the status of (and plans for) ttH and tH searches in various channels, with emphasis on theory related issues and limitations;
      • to discuss state-of-the art theory predictions, their present limitations, and possible improvements;
      • to identify and prioritise all needed theoretical improvements.

    • As theory issues are often connected to technical aspects of the ttH analyses, we propose to structure this series of topical meetings in a way that guarantees an optimal involvement of the experimental experts that are working on the various analyses. We thus propose:
      • approximately 8 meetings of max 1.5 h each , to be held on a weekly basis in Oct/Nov 2014;
      • each meeting will be devoted to a particular ttH or tH analysis channel and include two experimental talks (15’ ATLAS + 15’ CMS) and a 15’ theory talk;
      • the emphasis of experimental talks should be on the employed theory tools, the key sources of theoretical uncertainties, their treatment and their impact in the framework of the experimental analyses;
      • theory talks will review the status of ttH topics that are especially relevant for (but not restricted to) the ttH analysis at hand.
     

    Group Members and Contributors: Incomplete - please contact us if you want to be included.

    Added:
    >
    >
    <!-- OLD LIST - How to update 
     
    • Pierre Artoisenet, Theory
    • Fabio Cascioli, Theory
    • Chris Collins-Tooth, ATLAS - ex-oficio group contact
    Line: 38 to 84
     
    • Robbert Rietkerk, Theory
    • Jennifer Thompson, Theory
    • Zoltan Trocsanyi, Theory
    Changed:
    <
    <
    • Doreen Wackeroth, Theory
    >
    >
     
    • Doreen Wackeroth, Theory -->
     
    Line: 49 to 95
     
    Changed:
    <
    <

    Meetings

    >
    >

    Previous Meetings

     

    Revision 102014-06-10 - ChrisNeu

    Line: 1 to 1
     
    META TOPICPARENT name="CrossSections"

    ttH Higgs Associated Production Process

    Changed:
    <
    <

    Goal of the group

    • To understand the modeling of the ttH process for use in LHC low mass Higgs searches.
    >
    >

    Goals of the group:

    • To understand the modeling of the ttH and tH processes for use in LHC low mass Higgs searches.
    • To explore techniques for modeling the important backgrounds in ttH and tH searches
    • To understand the specific needs of ttH and tH analyses
     

    Group Contacts:

    Changed:
    <
    <
    • Chris Potter, ATLAS
    • Chris Neu, CMS
    • Laura Reina, Theory
    • Michael Spira, Theory
    >
    >
    • Aurelio Juste, Peter Onyisi - ATLAS
    • Chris Neu, Andrea Rizzi - CMS
    • Laura Reina - Theory
    • Michael Spira - Theory
     
    Changed:
    <
    <

    Group Members:

    • Joey Huston, ATLAS
    >
    >

    Group Members and Contributors: Incomplete - please contact us if you want to be included.

    • Pierre Artoisenet, Theory
    • Fabio Cascioli, Theory
    • Chris Collins-Tooth, ATLAS - ex-oficio group contact
     
    • Sally Dawson, Theory
    Added:
    >
    >
    • Simon Dean, ATLAS - ex-oficio group contact
    • Stefan Dittmaier, Theory
    • Rikkert Frederix, Theory
    • Maria Vittoria Garzelli, Theory
    • Stefan Hoeche, Theory
    • Joey Huston, ATLAS
    • Adam Kardos, Theory
    • Frank Krauss, Theory
    • Michael Kraemer, Theory
    • Kevin Lannon, CMS
    • Philipp Maierhoefer, Theory
    • Olivier Mattelaer, Theory
    • Niccolo Moretti, Theory
    • Jim Olsen, CMS - ex-oficio group contact
    • Costas Papadopoulos, Theory
    • Chris Potter, ATLAS - ex-oficio group contact
    • Stefano Pozzorini, Theory
    • Robbert Rietkerk, Theory
    • Jennifer Thompson, Theory
    • Zoltan Trocsanyi, Theory
    • Doreen Wackeroth, Theory

     

    Available Tools

    • HQQ ( M. Spira):

    Revision 92012-05-06 - LauraReina

    Line: 1 to 1
     
    META TOPICPARENT name="CrossSections"

    ttH Higgs Associated Production Process

    Line: 27 to 27
     
    • Minutes of informal get-acquainted meeting - 18 Feb 2010
    • Minutes from meeting dedicated to preparations for Freiburg - 31 March 2010
    • Minutes from meeting dedicated to preparations for CERN meeting - 9 June 2010
    Changed:
    <
    <
    >
    >
    • Minutes from meeting of May 4, 2012
     

    Links

    Changed:
    <
    <
    <!--   * minute_tth_18_feb_10.txt: minute_tth_18_feb_10.txt -->
    <!--   * set_up_tth_freiburg-1.txt: set_up_tth_freiburg-1.txt -->
    >
    >
    <!--   * minute_tth_18_feb_10.txt: minute_tth_18_feb_10.txt -->
    <!--   * set_up_tth_freiburg-1.txt: set_up_tth_freiburg-1.txt -->
     
    <!--   * minutes_tth_09_jun_10.txt: minutes from 9 June mtg -->
    Line: 43 to 42
     
    META FILEATTACHMENT attachment="minutes_tth_31_mar_10_v2.txt" attr="" comment="" date="1270574882" name="minutes_tth_31_mar_10_v2.txt" path="minutes_tth_31_mar_10_v2.txt" size="2561" stream="minutes_tth_31_mar_10_v2.txt" tmpFilename="/usr/tmp/CGItemp39087" user="neu" version="1"
    META FILEATTACHMENT attachment="minutes_tth_09_jun_10.txt" attr="" comment="minutes from 9 June mtg" date="1277933514" name="minutes_tth_09_jun_10.txt" path="minutes_tth_09_jun_10.txt" size="2450" stream="minutes_tth_09_jun_10.txt" tmpFilename="/usr/tmp/CGItemp58943" user="neu" version="1"
    META FILEATTACHMENT attachment="set_up_tth_cern.txt" attr="" comment="setup for July 2010 CERN mtg results" date="1277933554" name="set_up_tth_cern.txt" path="set_up_tth_cern.txt" size="3738" stream="set_up_tth_cern.txt" tmpFilename="/usr/tmp/CGItemp59044" user="neu" version="1"
    Added:
    >
    >
    META FILEATTACHMENT attachment="minutes_tth_050412.txt" attr="" comment="minutes from May,4 2012 meeting" date="1336307819" name="minutes_tth_050412.txt" path="minutes_tth_050412.txt" size="1879" stream="minutes_tth_050412.txt" tmpFilename="/usr/tmp/CGItemp17752" user="reina" version="1"
     
    META TOPICMOVED by="tanaka" date="1265556563" from="LHCPhysics.HiggsTTH" to="LHCPhysics.TTH"

    Revision 82010-10-01 - ChristopherPotter

    Line: 1 to 1
     
    META TOPICPARENT name="CrossSections"

    ttH Higgs Associated Production Process

    Line: 6 to 6
     
    • To understand the modeling of the ttH process for use in LHC low mass Higgs searches.

    Group Contacts:

    Changed:
    <
    <
    • Simon Dean, ATLAS
    >
    >
    • Chris Potter, ATLAS
     
    • Chris Neu, CMS
    • Laura Reina, Theory
    • Michael Spira, Theory

    Revision 72010-06-30 - ChrisNeu

    Line: 1 to 1
     
    META TOPICPARENT name="CrossSections"

    ttH Higgs Associated Production Process

    Line: 20 to 20
     

    Documents

    Added:
    >
    >
     

    Meetings

    Added:
    >
    >
    • Minutes from meeting dedicated to preparations for CERN meeting - 9 June 2010
     

    Links

    <!--   * minute_tth_18_feb_10.txt: minute_tth_18_feb_10.txt -->
    <!--   * set_up_tth_freiburg-1.txt: set_up_tth_freiburg-1.txt -->
    Added:
    >
    >
    <!--   * minutes_tth_09_jun_10.txt: minutes from 9 June mtg -->

    <!--   * set_up_tth_cern.txt: setup for July 2010 CERN mtg results -->
     
    META FILEATTACHMENT attachment="minute_tth_18_feb_10.txt" attr="h" comment="" date="1268687212" name="minute_tth_18_feb_10.txt" path="minute_tth_18_feb_10.txt" size="2932" stream="minute_tth_18_feb_10.txt" tmpFilename="/usr/tmp/CGItemp16402" user="neu" version="1"
    META FILEATTACHMENT attachment="set_up_tth_freiburg-1.txt" attr="h" comment="" date="1268687468" name="set_up_tth_freiburg-1.txt" path="set_up_tth_freiburg-1.txt" size="4110" stream="set_up_tth_freiburg-1.txt" tmpFilename="/usr/tmp/CGItemp16506" user="neu" version="1"
    META FILEATTACHMENT attachment="minutes_tth_31_mar_10.txt" attr="" comment="" date="1270574576" name="minutes_tth_31_mar_10.txt" path="minutes_tth_31_mar_10.txt" size="2605" stream="minutes_tth_31_mar_10.txt" tmpFilename="/usr/tmp/CGItemp16379" user="neu" version="1"
    META FILEATTACHMENT attachment="minutes_tth_31_mar_10_v2.txt" attr="" comment="" date="1270574882" name="minutes_tth_31_mar_10_v2.txt" path="minutes_tth_31_mar_10_v2.txt" size="2561" stream="minutes_tth_31_mar_10_v2.txt" tmpFilename="/usr/tmp/CGItemp39087" user="neu" version="1"
    Added:
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    META FILEATTACHMENT attachment="minutes_tth_09_jun_10.txt" attr="" comment="minutes from 9 June mtg" date="1277933514" name="minutes_tth_09_jun_10.txt" path="minutes_tth_09_jun_10.txt" size="2450" stream="minutes_tth_09_jun_10.txt" tmpFilename="/usr/tmp/CGItemp58943" user="neu" version="1"
    META FILEATTACHMENT attachment="set_up_tth_cern.txt" attr="" comment="setup for July 2010 CERN mtg results" date="1277933554" name="set_up_tth_cern.txt" path="set_up_tth_cern.txt" size="3738" stream="set_up_tth_cern.txt" tmpFilename="/usr/tmp/CGItemp59044" user="neu" version="1"
     
    META TOPICMOVED by="tanaka" date="1265556563" from="LHCPhysics.HiggsTTH" to="LHCPhysics.TTH"

    Revision 62010-04-06 - ChrisNeu

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    META TOPICPARENT name="CrossSections"

    ttH Higgs Associated Production Process

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    Meetings

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    • Minutes from meeting dedicated to preparations for Freiburg - 31 March 2010
     

    Links

    <!--   * minute_tth_18_feb_10.txt: minute_tth_18_feb_10.txt -->
    <!--   * set_up_tth_freiburg-1.txt: set_up_tth_freiburg-1.txt -->

    META FILEATTACHMENT attachment="minute_tth_18_feb_10.txt" attr="h" comment="" date="1268687212" name="minute_tth_18_feb_10.txt" path="minute_tth_18_feb_10.txt" size="2932" stream="minute_tth_18_feb_10.txt" tmpFilename="/usr/tmp/CGItemp16402" user="neu" version="1"
    META FILEATTACHMENT attachment="set_up_tth_freiburg-1.txt" attr="h" comment="" date="1268687468" name="set_up_tth_freiburg-1.txt" path="set_up_tth_freiburg-1.txt" size="4110" stream="set_up_tth_freiburg-1.txt" tmpFilename="/usr/tmp/CGItemp16506" user="neu" version="1"
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    META FILEATTACHMENT attachment="minutes_tth_31_mar_10.txt" attr="" comment="" date="1270574576" name="minutes_tth_31_mar_10.txt" path="minutes_tth_31_mar_10.txt" size="2605" stream="minutes_tth_31_mar_10.txt" tmpFilename="/usr/tmp/CGItemp16379" user="neu" version="1"
    META FILEATTACHMENT attachment="minutes_tth_31_mar_10_v2.txt" attr="" comment="" date="1270574882" name="minutes_tth_31_mar_10_v2.txt" path="minutes_tth_31_mar_10_v2.txt" size="2561" stream="minutes_tth_31_mar_10_v2.txt" tmpFilename="/usr/tmp/CGItemp39087" user="neu" version="1"
     
    META TOPICMOVED by="tanaka" date="1265556563" from="LHCPhysics.HiggsTTH" to="LHCPhysics.TTH"

    Revision 52010-03-15 - ChrisNeu

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    META TOPICPARENT name="CrossSections"

    ttH Higgs Associated Production Process

    Goal of the group

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    • To understand the modeling of the ttH process for use in LHC low mass Higgs searches.
     
    Changed:
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    <

    Group Member

    >
    >

    Group Contacts:

    • Simon Dean, ATLAS
    • Chris Neu, CMS
    • Laura Reina, Theory
    • Michael Spira, Theory

    Group Members:

    • Joey Huston, ATLAS
    • Sally Dawson, Theory
     

    Available Tools

    • HQQ (M. Spira):

    Documents

    Added:
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    >
     

    Meetings

    Changed:
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    <
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    >
    • Minutes of informal get-acquainted meeting - 18 Feb 2010
     

    Links

    Added:
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    >
    <!--   * minute_tth_18_feb_10.txt: minute_tth_18_feb_10.txt -->
    <!--   * set_up_tth_freiburg-1.txt: set_up_tth_freiburg-1.txt -->
     
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    META FILEATTACHMENT attachment="minute_tth_18_feb_10.txt" attr="h" comment="" date="1268687212" name="minute_tth_18_feb_10.txt" path="minute_tth_18_feb_10.txt" size="2932" stream="minute_tth_18_feb_10.txt" tmpFilename="/usr/tmp/CGItemp16402" user="neu" version="1"
    META FILEATTACHMENT attachment="set_up_tth_freiburg-1.txt" attr="h" comment="" date="1268687468" name="set_up_tth_freiburg-1.txt" path="set_up_tth_freiburg-1.txt" size="4110" stream="set_up_tth_freiburg-1.txt" tmpFilename="/usr/tmp/CGItemp16506" user="neu" version="1"
     
    META TOPICMOVED by="tanaka" date="1265556563" from="LHCPhysics.HiggsTTH" to="LHCPhysics.TTH"

    Revision 42010-02-08 - ReiTanaka

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    META TOPICPARENT name="CrossSections"

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    Meetings

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    Links

     
    META TOPICMOVED by="tanaka" date="1265556563" from="LHCPhysics.HiggsTTH" to="LHCPhysics.TTH"

    Revision 32010-02-07 - ReiTanaka

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    Changed:
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    META TOPICPARENT name="HiggsCrossSection"
    >
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    META TOPICPARENT name="CrossSections"
     

    ttH Higgs Associated Production Process

    Goal of the group

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    Meetings

    \ No newline at end of file
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    META TOPICMOVED by="tanaka" date="1265556563" from="LHCPhysics.HiggsTTH" to="LHCPhysics.TTH"

    Revision 22010-02-07 - ReiTanaka

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    META TOPICPARENT name="HiggsCrossSection"
    Added:
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    ttH Higgs Associated Production Process

     
    Added:
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    >

    Goal of the group

     
    Added:
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    >

    Group Member

     
    Added:
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    >

    Available Tools

    • HQQ (M. Spira):
     
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    -- ReiTanaka - 07-Feb-2010
     \ No newline at end of file
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    Documents

    Meetings

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    Revision 12010-02-07 - ReiTanaka

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    META TOPICPARENT name="HiggsCrossSection"

    -- ReiTanaka - 07-Feb-2010

     
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