Report from the HSG3 HWW VBF Hinv

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Report from the HSG3(H?WWVBF H?inv)

• B.Mellado on behalf of the Subgroup
• Many thanks to T.Dai, J.Tanaka, M.Schram,
  I.Tsukerman, E.Feng, M.A. Pleier, C.Schmitt,
• M.Durhseen, B.Quayle, etc..
• Higgs WG Meeting, PP Workshop 07/11/08

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Outline

• Groups Organization
• Tentative list of activities for next 6 months
• Connection with Performance, SM/top groups
• Connection with the EW subgroup
• Kick-off activities
• Performance DPD discussion
• MC tasks
• Validation strategy
• Outlook

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Groups Organization

• The subgroup is very active. So far 12 institutes
  with 50 participants.
• Most of interest clustered around the di-leptonic
  decay H?WW?ll (le,µ)
• Interest has been expressed for the H?WW?l?qq
  (le,µ) and VBF H?inv analyses

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Activities for Next 6 Months

• This is a tentative and non-exhaustive
• Finalize the same flavor analysis (see Tastuya's
  and Ruslans talks at the HWG)
• Understand the contribution from noise to MET
• Data with random triggers is already available
• Understand what is the potential impact (if any)
  of comics in our analysis
• VBF H?inv may be affected
• Develop data-driven methods to extract tt,QCD
• Study the potential of same sign leptons to
  normalize background
• 10 TeV samples, make full use of ATLFAST-II
• NNLO cross-sections, EW corrections
• Etc

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Connection with Performance, SM/Top Groups

• Clear ideas of and strong involvement of
  institutes in Performance and SM/Top groups

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Connection with the EW Subgroup

• Several institutes involved in s(WW)
• Propose a joint meeting to decide on
• Overview common areas of work in the performance
  groups. Concretize a set of common object
  definitions
• Common tools and procedures for the extraction of
  common backgrounds, in particular ZW, ttbar,
  Wjets and QCD
• Common D3PD for s(WW) and H?WW?ll.
• Finalize definition of common MC samples,
  validation and DQM procedures.
• A.O.B.
• Suggest Jan 14th to allow for time for prep.

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Perf. DPD Discussion

• Twiki page for information and updates
• https//twiki.cern.ch/twiki/bin/viewauth/AtlasProt
  ected/HSG3PerfDPDSummary
• Highlighted in red the Perf. DPDs which content
  is being evaluated in our subgroup

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Perf. DPD Discussion (cont)

• Looked at the contents of the Performance DPDs
  and found that the DPD SINGLEMU and DPD SINGLEEL
  appear to have sufficient and similar information
• DPD LARGEMET didnt have CaloCell information.
  Now it does
• Well look into the re-processing shortly
• In addition, Ilyas suggested to look at DPD
  MINBIAS and DPD JET
• Eric indicates that pre-scale/cuts are too loose.
  DPD jet may not be useful for us
• For VBF Invisible Higgs the Perf. DPDs do not
  look suitable.

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MC Tasks

• Work very closely with J.Tanaka and
• Write, maintain, validate job options
• Generate 4-vector files for central and local
  production.
• Validate interfaces and develop new ones.
• Joboptions now available for ggH (Pythia) and VBF
  (Herwig) signal mass scans (110-600)
• https//twiki.cern.ch/twiki/bin/view/AtlasProtecte
  d/HiggsWGHSG3Dataset
• Working on MC_at_NLO/Sherpa
• Dealing with backgrounds
• Coordinating with the EW subgroup
• Validated H?WW?l?l? spin correlation in Herwig

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Spin Correlations in Herwig

• Spin correlation in is introduced into ATHENA by
  Jon Butterworth with correction patch from Herwig
  author to CV, CVS tags Herwig_i-00-03-09,
  Charybdis_i-00-00-09

ggH
VBF H
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Validation Strategy

• Automatic validation at the generator,
  reconstruction levels and data
• There are already nice frameworks available
  within ATLAS for validating samples
• DCube for software validation/testing
• DQMF for Data Quality monitoring
• Run over pool based data format (AOD, DPD) for
  increased ?exibility
• Create summary webpage with plots for each
  sample. All code in dedicated athena package
  (of?cial CVS)
• Making proposal for validation plots

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Twiki for Validation Activities
Under development
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Outlook

• Active, with 12 institutes and 50 participants
• Most of interest clustered around the di-leptonic
  decay H?WW?ll (le,µ)
• Interest has been expressed for the H?WW?l?qq
  (le,µ) and VBF H?inv analyses
• Clear ideas of and strong involvement of
  institutes in Performance and SM/Top groups
• Definition of job options well underway.
  Validated H?WW?l?l? in Herwig
• Gave first feedback on Performance DPD
• Defined strategy for automated validation of MC
  and data