My LHC Physics Page

Table of Contents

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Higgs LHC

• A new boson 2012
  • CMS: arXiv:1207.7235, New-boson page
  • ATLAS: arXiv:1207.7214
• LHC Higgs Cross Section Working Group (Twiki)
  • Handbook 1 (Inclusive variables) arXiv.1101.0593
  • Handbook 2 (Differential distributions) arXiv.1201.3084
  • arXiv:1107.5909 Standard Model Higgs-Boson Branching Ratios with Uncertainties
• arXiv:1107.5569 Gluon-gluon contributions to W+W− production and Higgs interference effects (theo)

Higgs CMS

• CMS Higgs Meetings
• CMS Higgs PAG
• Public Higgs Twiki

ICHEP 2012

• Tevatron
• ATLAS Higgs Combo (Draft July 2012)
• ATLAS HTauTau arXiv:1206.5971

Moriond 2012

• Link to Moriond EWK talks
• Link to Moriond QCD Talks
• HTauTau arXiv:1202.4083

LP 2011 (August)

• Results (CDS)
  • HIG-11-018 Higgs Combination (CMS/sS): a deeper scrutiny will be needed to have all details fully understood and cross-checked by the two large communities
  • HIG-11-022 SM Higgs Combination (CMS)
  • HIG-11-015 H -> ZZ -> 4l
  • HIG-11-021 H -> gam gam
  • HIG-11-020 H ->Tau Tau
  • HIG-11-017 H -> 2l 2jet
  • HIG-11-016 H -> ZZ -> 2l 2nu
  • HIG-11-014 H -> WW -> 2l2nu (0, 1, 2 jets)
  • HIG-11-013 H -> ZZ -> 2l 2tau
  • HIG-11-012 VH Production with H -> bb
  • H+ -> Tau in Top quark decays: obviously no update
  • H++ -> l+ l+: obviously no update
• CERN press release Aug 22, CMS Higgs
• LP conference page
• Approvals, Htautau Approval Aug 25

EPS/HEP 2011 (July)

• Presentation of EPS results at DESY, July 25
• Results (CDS)
  • HIG-11-011 SM Higgs Combination
  • HIG-11-004 H -> ZZ -> 4l
  • HIG-11-010 H -> gam gam
  • HIG-11-009 H ->Tau Tau
  • HIG-11-006 H -> 2l 2jet
  • HIG-11-005 H -> ZZ -> 2l 2nu
  • HIG-11-003 H -> WW -> 2l2nu (0, 1, 2 jets)
  • HIG-11-008 H+ -> Tau in Top quark decays
  • HIG-11-007 H++ -> l+ l+
• Talks given at Higgs Hunting workshop
• EPS conference page
• CMS public statement
• General Meeting July 20, 2011: summary on Higgs results for EPS
• Approvals
• Practice talks

Higgs DESY

Links

• Higgs Group Meetings (Thursday 10:00)
• KA-HH Tau Group Meetings (Tuesday 13:15)
• DESY indico

KIT

• Embedding Twiki page (August 2011)

Higgs other than LHC

• Tevatron Moriond 2012
• Fermiophobic summer at Tevatron
• arXiv:1107.5518, Combined CDF and D0 Upper Limits on Standard Model Higgs Boson Production with up to 8.6 fb−1 of Data
• arXiv:1107.4960, Combined CDF and D0 Searches for the Standard Model Higgs Boson Decaying to Two Photons with up to 8.2 fb-1 [Tevaron combined]
• arXiv:1106.4885, Search for neutral Higgs bosons decaying to tau pairs produced in association with b quarks in pp collisions at sqrt(s)= 1.96 TeV [D0 @ Tevatron]

Higgs ATLAS

• HTauTau Moriond 2012
• ATLAS Higgs combination, ATLAS Htautau
• arXiv:1107.5003, Search for neutral MSSM Higgs bosons decaying to tautau pairs in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector [2010 data, 276 events]

Notes from my early Higgs meetings

• 12.5. 2011, Higgs DESY Meeting
  • Isolation cut.
  • A. standalone muons: DT, CSC, RPC ("muon spectrometer"). in addition possibly beam spot to improve resolution.
  • B . tracker muons
  • C. merge A&B
  • https://twiki.cern.ch/twiki/bin/view/CMSPublic/SWGuideStandAloneMuonReco
• 10.5.2011, Htautau Karlsruhe/DESY https://indico.desy.de/conferenceDisplay.py?confId=4369
  • Agni look to 2011 data.
  • In-time pile-up seems to be OK simulated, out-of-time not in spring 2011 MC.
  • MET distros data/MC do not agree, secondary vertex (SV) re-weighting makes the situation even rather worse.
  • Guenther Quast: plot number of PV vs. number of jets.
  • Might have to correct also other variables.
  • 2010 data was better agreement (even though not perfect), another indication that pile-up causes disagreement MC/data.
• 14.4.2011, DESY-Higgs http://indico.desy.de/conferenceDisplay.py?confId=4267
  • First look to Collisions11

Other (general) Notes

• [Nov 2011] Luca on 2012 physics
• [3.8.2011] hard interaction vertex = primary vertex with largest track sum(pT). primary vertex stems from pp collision point, unlike secondary vertex e.g. from decay
• [3.8.2011] pile-up = function(beam intensity/density and beta-function(transverse beam size, NOT # of bunches)). instantaneous lumi = function(all 3) does not depend on number of bunches, only on instantaneous lumi
• [1.8.2011] Htautau analysis: QCD and ttbar background: Pythia. Z-production: powheg. (Madgraph?). Polarization properties of tau decays: Tauola
• [1.8.2011] |eta|<2.1 for muons with p>20 GeV/c: due to trigger acceptance, threshold 17 GeV. |eta|<2.4 for muons with p>10 GeV/c: due to muon system acceptance. Lower mom muon could also trigger.
• [1.8.2011] Higgs does not couple to massless particles.
• arXiv:1107.4277, Determination of Jet Energy Calibration and Transverse Momentum Resolution in CMS
• Nice Higgs talk at Blois, Giovanni Punzi, 30.5.2011 http://blois.in2p3.fr/2011/transparencies/punzi.pdf
• Oscar Stal (through Andreas): slides at https://indico.desy.de/getFile.py/access?contribId=3&resId=0&materialId=slides&confId=4078 To summarize: In NMSSM scenarios Higgs Bosons can be lighter than the Z and as low as 40 GeV. In that case Higgs can be detected in SUSY cascades. The BR into bbbar for such H_1 is 100%. The general properties lead to selection cuts that are rather similar as RA2b (or also RA4b): page 17, including a very high MET cut.
• May 2011, PHOTON2011
  • Elastic photoproduction of J/Psi and Psi(2S) at LHCb: Marius Bjornstad http://agenda.irmp.ucl.ac.be/materialDisplay.py?contribId=32&sessionId=4&materialId=slides&confId=924
    • LHCb is forward detector
    • 2 muons + possibly a photon. Can trigger down to low pT (80 MeV)
    • exclusive cuts: no backward tracks
    • around 2000 (+400 with 1 photon) events with J/Psi, 60 for Psi
    • First observation of central exclusive production through di-photon exchange
    • Google for "diffractive and electromagnetic processes at the LHC"
    • Bernard: and now study TCS!
  • Exclusive di-lepton measurements in CMS: Nicolas Schul http://agenda.phys.ucl.ac.be/contributionDisplay.py?sessionId=2&contribId=58&confId=924
    • Exclusivity condition only tracker due to PU (no calorimeters).
    • deltaphi (back to back), deltapT (balanced in pT - not the case for Cosmic muons)
    • lowest pT (one muon) is 3 GeV
    • 148 cands (2010 data, 40 pb-1)
    • no excl. Z prod, as expected from SM
    • x-section 3.35 pb \pm 0.14 \pm 0.13
    • LPAIR theo: 4.08 pb
    • Signal can serve as normalization for integrated lumi
  • Chiara Roda. [nice intro to underlying event] http://agenda.irmp.ucl.ac.be/getFile.py/access?contribId=44&sessionId=4&resId=0&materialId=slides&confId=924
• 24.3.2011, DESY Tuesday seminar
  • Thomas Schoerner-Sadenius: Jets - a tool for studying "old" and "new" physics http://physikseminar.desy.de/sites2009/site_physikseminar/content/e212/e68319/e72672/e75895/schoerner.pdf
• 15.3.2011 at CERN
  • pre-approval: FWD 10 - 005 - Measurement of exclusive muon production at 7 TeV, Nicolas Schul http://indico.cern.ch/getFile.py/access?contribId=2&resId=0&materialId=slides&confId=123075
  • pre-approval: FWD 10-008 - Forward Energy Flow and Central Track, Multiplicities in W and Z boson Events, Ann-Karin Sanchez http://indico.cern.ch/getFile.py/access?contribId=1&resId=0&materialId=slides&confId=123075
• 9.3.2011 at CERN
  • Status of Central RelVal Automation, Danilo Piparo http://indico.cern.ch/getFile.py/access?contribId=9&resId=0&materialId=slides&confId=129059
  • Pile-up in W/Z events, Juerg Eugster http://indico.cern.ch/getFile.py/access?contribId=8&resId=0&materialId=slides&confId=129059
  • Prelim 2011 trigger menu https://twiki.cern.ch/twiki/bin/viewauth/CMS/HLTMenu5e32v4
• 8.3.2011 at CERN
  • Lumi section based validation - ECAL, Martina Malberti http://indico.cern.ch/getFile.py/access?contribId=6&resId=0&materialId=slides&confId=130347
• 5.3.2011 at CERN
  • Approval talk EWK-10-013 cross section for Z to tautau, Monica Vazquez Acosta http://indico.cern.ch/getFile.py/access?contribId=16&sessionId=9&resId=1&materialId=slides&confId=127384
  • Approval Talk HIG-10-002 Search for SUSY Higgs decaying to Tau+ Tau- final state, Markus Klute http://indico.cern.ch/getFile.py/access?contribId=17&sessionId=9&resId=1&materialId=slides&confId=127384

-- CarolineRiedl - 21-Jul-2011