トップクォーク対生成スピン偏極度相関におけるパリティーの破れの探索
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トップクォーク対生成スピン偏極度相関におけるパリティーの破れの探索. 2011 年度 FNAL 組 Hou orientation Feb. 21, 2012. 武内勇司. 素粒子実験室. Tevatron Run II. Chicago. CDF. DØ. TEVATRON. MAIN INJECTOR. Tevatron Proton-antiproton collisions at √s = 1.96 TeV Shutdown on Sep. 30, 2011 Final dataset: ~10 fb -1 expected for physics. - PowerPoint PPT PresentationTRANSCRIPT
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2011FNAL Hou orientationFeb. 21, 2012Tevatron Run IITevatronProton-antiproton collisions at s = 1.96 TeVShutdown on Sep. 30, 2011Final dataset: ~10 fb-1 expected for physics
CDFDChicagoTEVATRONMAIN INJECTORCategorize ttbar events into 3 decay types according to W decay modeDilepton 2 lepton 2 b-jet METAll Hadronic 6 jet(2 b-jet)Lepton+Jet 1 lepton 4 jet(2 b-jet) METggggg++gg85%15%
down-type
Beam P-reversal
CDF 5.1 fb-1 dileptonSuggesting V+A coupling?NLO prediction: Interference between LO and NLO+2V+2ggggXA?Afb results at Tevatron
V-A or V+AD0 5.4fb-1 l+jetsCDF 5.3 fb-1 l+jets
CDF 5.1 fb-1 dileptonFit function form w/o P conservation
backgroundfit5.1fb-1(5x5bin)bkg+signalfit5.1fb-1candidate 334 unbinned likelihood fit(3/12, 3/19)dilepton meetingstatusCDF note