(r59) LHCHWG1 < LHCPhysics

LHCPhysics Web>LHCHXSWG>LHCHWG1 (revision 59) (raw view)~~EditAttachPDF~~
---+ LHC Higgs Cross Section Working Group 1

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| *Mailing list:* | [[mailto:lhc-higgs-xsbr@cern.ch][lhc-higgs-xsbr@cern.ch]] %BR% use this [[https://e-groups.cern.ch][link]] to subscribe. |
| *Meetings* | [[http://indico.cern.ch/category/5847/][agenda]] |

---++ %ICON{led-green}% *%BLUE%Group Conveners%ENDCOLOR%*

|  *Mail to conveners*  | *ATLAS*  | *CMS*  |  *THEORY*  |||
| [[mailto:lhc-higgs-xsbr-convener@SPAMNOTcern.ch][Mail]] | [[mailto:roberto.di.nardo@SPAMNOTcern.ch][Roberto Di Nardo (Roma III)]] (12/2020)| [[mailto:julie.malcles@SPAMNOTcern.ch][Julie Malclès (CEA, Paris-Saclay)]] (12/2020) | [[mailto:johnmc@SPAMNOTfnal.gov][John Campbell (Fermilab) ]] | [[mailto:alexander.karlberg@SPAMNOTNOSPAMPLEASE.physics.ox.ac.uk][Alexander Karlberg (Oxford)]] |

---++ %ICON{led-green}% *%BLUE%Sub-working Group / Task-force Group Conveners%ENDCOLOR%*

| *Group TWiki*  |  *Group Mailing List*  |  *Mail to conveners* |  *ATLAS*  |  *CMS*  |  *THEORY*  |||
| *[[LHCHWGBRs][%YELLOW%BR%ENDCOLOR%]]* | | [[mailto:lhc-higgs-br-convener@SPAMNOTcern.ch][Mail]] | [[mailto:daniela.rebuzzi@SPAMNOTcern.ch][Daniela Rebuzzi (Pavia)]] | [[mailto:ivica.puljak@SPAMNOTfesb.hr][Ivica Puljak (Split)]] | [[mailto:denner@SPAMNOTphysik.uni-wuerzburg.de][Ansgar Denner (Würzburg)]] | [[mailto:Sven.Heinemeyer@SPAMNOTcern.ch][Sven Heinemeyer (IFCA)]] | [[mailto:mueck@SPAMNOTphysik.rwth-aachen.de][Alexander Mück (Aachen)]] |
| *[[LHCHWGGGF_RUN2][%YELLOW%ggF%ENDCOLOR%]]* | | [[mailto:lhc-higgs-ggf-convener@SPAMNOTcern.ch][Mail]] | [[mailto:sabidi@SPAMNOTcern.ch][Syed Haider Abidi (BNL)]]  | [[mailto:Andrea.Massironi@SPAMNOTcern.ch][Andrea Massironi (Northeastern U)]] | [[mailto:bernhard.mistlberger@SPAMNOTcern.ch][Bernhard Mistlberger (CERN)]] | | |
| *[[LHCHWGVBF][%YELLOW%VBF%ENDCOLOR%]]* | [[mailto:dummy.name@cern.ch,lhc-higgs-xsbr-vhvbf@SPAMNOTcern.ch][Mailing List]] | [[mailto:lhc-higgs-vbf-convener@SPAMNOT.cern.ch][Mail]]  | [[mailto:antonio.de.maria@cern.ch][Antonio De Maria (Nanjing University)]] | [[mailto:yacine.haddad@SPAMNOTcern.ch][Yacine Haddad (Imperial College)]] | [[mailto:mathieu.pellen@SPAMNOTphysik.uni-freiburg.de][Mathieu Pellen (Freiburg) ]]  | [[mailto:simon.plaetzer@univie.ac.at][Simon Plaetzer (University of Vienna)]] | |
| *[[LHCHWGVH][%YELLOW%VH%ENDCOLOR%]]* | [[mailto:dummy.name@cern.ch,lhc-higgs-xsbr-vhvbf@SPAMNOTcern.ch][Mailing List]] | [[mailto:lhc-higgs-vh-convener@SPAMNOTcern.ch][Mail]] | [[mailto:thomas.calvet@stonybrook.edu][Thomas Calvet (CPPM, Aix Marseille University)]] | [[mailto:alessandro.calandri@SPAMNOTcern.ch][Alessandro Calandri (ETH Zurich)]] | [[mailto:ciaranwi@buffalo.edu][Ciaran Williams (Buffalo)]] | [[mailto:giancarlo.ferrera@mi.infn.it][Giancarlo Ferrera (University of Milan)]] | |
| *[[LHCHWGTTH][%YELLOW%ttH/tH%ENDCOLOR%]]* | [[mailto:dummy.name@SPAMNOTcern.ch,lhc-higgs-xsbr-tth@SPAMNOTcern.ch][Mailing List]] | [[mailto:lhc-higgs-tth-convener@SPAMNOTcern.ch][Mail]] | [[mailto:joshua.angus.mcfayden@SPAMNOTcern.ch][Josh McFayden (University of Sussex)]] | [[mailto:benjamin.stieger@SPAMNOTcern.ch][Joshuha Thomas-Wilsker (Chinese Academy of Sciences)]] | [[mailto:pozzorin@SPAMNOTphysik.uzh.ch][Stefano Pozzorini (Zürich)]] | [[mailto:reina@SPAMNOThep.fsu.edu][Laura Reina (Florida)]] | |
| *[[LHCHWGOFFSHELL][%YELLOW%Offshell%ENDCOLOR%]]* | | [[mailto:lhc-higgs-offshell-convener@SPAMNOTcern.ch][Mail]] | [[mailto:lailin.xu@SPAMNOTcern.ch][Lailin Xu (Brookhaven BNL)]] | [[mailto:meng.xiao@SPAMNOTcern.ch][Ulascan Sarica (Univ. of California Santa Barbara)]] | [[mailto:n.kauer@SPAMNOTrhul.ac.uk][Nikolas Kauer (Royal Holloway)]] | [[mailto:raoul.rontsch@cern.ch][Raoul Roentsch (KIT, Karlsruhe)]] | |

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| *Group*  | *ShortDescription*  | *Deliverables* | *Timescale*  |  *Notes*  | *Status* |

| *%YELLOW%ggF%ENDCOLOR%*  | PS uncertainties | [potentially public note] | >2021 | Start looking at the new MiNNLOPS sample and use this as testbed to kick start some of the shower uncertainties  studies| Starting |
| *%YELLOW%ggF%ENDCOLOR%*  | <p> Uncertainties in kinematic regions  </p> | <p>Recommendation (LHCXSWG-INT-2017-001); [[https://indico.cern.ch/event/618048/attachments/1430472/2204126/ggF_qcd_uncertainty_2017.cxx][Tool]] </p> <p> Working on a public note with the new recommendation with WG2 </p>| <p> </p> --- <p>Summer 2021 </p> | <p>It is a set of per-event weights, one for each source of uncertainty, to plug&play using the simplified/template cross section setup. Implemented everything in MINLO NNLOPS, being this the reference and the most up to date generator.</p> <p>Re-weighting Powheg to NNLOPS is *mandatory* , since the uncertainties have been calculated with a given perturbative order, and if it is not matched with the generator, the result may be inconsistent.</p> <p> Recent progress:  High-Pt results from WG1 (see next line) incorporated+ agreement reached on NP definition between ATLAS, CMS and theory community.</p>| <p>Old STXS: done</p> <p>New STXS 1.2: In progress (finalizing the numbers) </p> |
| *%YELLOW%ggF%ENDCOLOR%*  | Boosted-Higgs cross-section recommendation  | Recommendation (LHCXSWG-2019-002)  | Fall 2019  | [[https://cds.cern.ch/record/2669113/][Note available here]] and update [[https://arxiv.org/pdf/2005.07762.pdf][here]] | Done |
| *%YELLOW%VBF%ENDCOLOR%*  | PS uncertainties  | [[https://arxiv.org/abs/2003.12435][Public note with detailed benchmark study]] | 2020 | Systematic investigation of parton shower and matching uncertainties for VBF, compare generators at NLO QCD matched with PYTHIA8 and HERWIG7 with NNLO, sets PS recommendation for the VBS/VBF topologies|Done|
| *%YELLOW%VBF%ENDCOLOR%*  | STXS uncertainties  | [[https://gitlab.cern.ch/LHCHIGGSXS/LHCHXSWG2/STXS/VBF-Uncertainties/tree/master][Public tool]], public note in preparation in collaboration with the WG2  | Spring/Summer 2020 | Developed a VBF uncertainty scheme for the STXS measurement that is currently used as a benchmark by both ATLAS and CMS, still some areas with room for improvement (for example in the EWK corrections in the EW H+2jets). | Mostly done, note being written|
| *%YELLOW%VBF%ENDCOLOR%* | Jet multiplicities merging and Parton shower accuracy | [potentially public note] | &gt;Summer 2020 | --- | In progress |
| *%YELLOW%VBF%ENDCOLOR%* | Higher-order corrections | [[https://arxiv.org/abs/2105.11399][Public note]] | 2021 | A comparative study of Higgs boson production from vector-boson fusion -- to be shown at the next general meeting | In progress |
| *%YELLOW%VBF%ENDCOLOR%* | Soft QCD effects, multi-parton interaction and colour reconnection | [public note in preparation] |2021|Vary colour reconnection and MPI parameters to stay within ~ 10% agreement of typical tuning observables, vary perturbative scales, specifically shower hard scale, full NLO+PS study including shower variations | In progress |
| *%YELLOW%VBF%ENDCOLOR%* | Higgs Boson Plus Dijets | [potentially public note] | Summer 2020 | --- | In progress |
| *%YELLOW%VH%ENDCOLOR%*  | VH XS prediction and uncertainties in STXS framework  | Software tool + recommendations  |  ---  | Goal: tool providing central value and uncertainties  | Initiated, see [[https://indico.cern.ch/event/824800/][here]] |
| *%YELLOW%VH%ENDCOLOR%*  | V+hf modeling for VH(bb)  | [potentially public note]   | 2021 |Project ongoing for ATLAS and CMS comparisons: MC comparisons across several V+hf MC tools targeting VH(bb) phase space, guidelines for theory uncertainties on V+hf predictions | In progress, see [[https://indico.cern.ch/event/698454/][here]] |
| *%YELLOW%VH%ENDCOLOR%*  | ggZH merged predictions  | [potentially public note], initial results in les houches 2019 proceedings with sherpa setup [[https://arxiv.org/abs/2003.01700][here]]  | 2021 |Comparison between showered ggZH 0+1jet merged LO MC prediction, and ggZH LO prediction. Initial results in Les Houche 2019 proceedings + being studied in ATLAS software | In progress |
| *%YELLOW%ttH/tH%ENDCOLOR%*  | tt+b-jets modelling  | [public note], recommendation being finalized, subgroup meeting late June/July 2021 | Summer 2021 | Provide the experiments with well-defined recommendations for the use of the corresponding Monte Carlo tools in experimental analyses | Being finalized |
| *%YELLOW%ttH/tH%ENDCOLOR%*  | tt+V (V=W,Z)->multi leptons modelling  | [potential public note] | Summer 2021  | Comparison and harmonisation between experimental analysis tools, push theory calculations, and eventually provide the experiments with well-defined recommendations for the use of the corresponding Monte Carlo tools in experimental analyses, already a substantial number of new developments from several groups (comparison of NLO MC, EW effects, off-shell effects) to be discussed in a sub-group meeting mid-June 2021 | To be finalized |
|  *%YELLOW%Offshell%ENDCOLOR%*  | Harmonise ATLAS/CMS/Theory  | Guiding documentations (public note on arXiv) | November 2020 |Collecting contributions on models/EFTs and MG5_aMC to be discussed in a meeting end of June 2021. TWiki page: HiggsOffshellTaskForce %BR% See here for the detailed plans: https://twiki.cern.ch/twiki/pub/LHCPhysics/HiggsOffshellTaskForce/task_force_info.pdf | In progress |

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[[PartonShowerUncertaintiesXSWG1][Studies on parton shower uncertainties]]

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Main.GiovanniMarchiori - 2020-03-27
Topic revision: r59 - 2021-06-11 - JulieMalcles
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