ATLAS PHYSICS STUDYin CHINA南昌高能物理大会一2010.4.18JAUOnbehalfofAtlasChineseCluster(IHEPNanjingU.,ShandongUUSTC
ATLAS PHYSICS STUDY in CHINA 南昌高能物理大会 – 2010.4.18 On behalf of Atlas Chinese Cluster (IHEP, Nanjing U., Shandong U., USTC)
OutlineIntroductionStandard model (electroweak)testsTopphysicsHiggssearchandpropertySUSYDetectorcommissioningSummaryCunfeng FengSingletopmeetingFCPPLworkshop
Cunfeng Feng Single top meetingFCPPL workshop, Wuhan 2 Outline • Introduction • Standard model (electroweak) tests • Top physics • Higgs search and property • SUSY • Detector commissioning • Summary
IntroductionTheLHCstatusX103.Collisionsstarted in2009:NATLASCollisionCandidates900MBTSA/C-side Coincidence Trigger- Maxpeak luminosity:~7x 1026cm-2s-1800700- Integrated luminosity:20 μb-1600Total→during stablebeams:12μb-1500DuringStableBeamsanenwns400(systematicuncertaintiesupto30%)3002002009100#ofcollisioncandidates:917.0006→duringstablebeams:538.000DayinDecember→ at 2.36 TeV:34.000Averagedatatakingefficiency:90 %(+Efficientofflinecomputing)Datasetsofarin2010-Plots/numberscurrentlyunderapprovalCunfeng FengSingletopmeetingFCPPLworkshor
Cunfeng Feng Single top meetingFCPPL workshop, Wuhan 3 Introduction The LHC status
RETATLASEXPERIMENTRunNumber:152166.EventNumber:810258Date:2010-03-3014:56:29CESTDi-jetEventat7TeVPhysics is now at our door !Cunfeng FengSingletopmeetingFCPPLworkshop
Cunfeng Feng Single top meetingFCPPL workshop, Wuhan 4 Physics is now at our door !
WZ studies.WZproductioncan involve TGCand sensitivetonewphysics· First observed by CDF- PRL 98, 161801 (2007)·Littleisknownsofar...FirstobservationofWZatCDFDO : 2.7-13 pb10CDF : 5.0-14 (stat) ±0.4(syst)(a)DataWz10Z-jetscrosssectionmeasurementwithearlyATLASdata10·a precisionelectroweaktest10·assesssystematiceffectsformultileptonanalyses-crucialforH->zz102030405060708090Er(GeV]As earlyas whenMETand multivariatetechniquesare notfullycommissionedApplybasiccutbasedleptonidentificationsonlyCunfeng FengSingletopmeetingFCPPLworkshop
Cunfeng Feng Single top meetingFCPPL workshop, Wuhan 5 WZ studies • WZ production can involve TGC and sensitive to new physics • First observed by CDF - PRL 98, 161801 (2007) •Little is known so far. First observation of WZ at CDF D0 : 2.7+1.7 −1.3 pb CDF : 5.0+1.8 −1.4 (stat) 0.4(syst) • cross section measurement with early ATLAS data • a precision electroweak test • assess systematic effects for multilepton analyses – crucial for H->ZZ . As early as when MET and multivariate techniques are not fully commissioned Apply basic cut based lepton identifications only