1 Study of Z+Jets background Study of Z+Jets background to SUSY LM1 Point to SUSY LM1 Point Huseyin Topakli Huseyin Topakli University of University of Ç Ç ukurova ukurova Anwar Bhatti Anwar Bhatti University of Rockefeller University of Rockefeller Gheorghe Lungu Gheorghe Lungu University of Rockefeller University of Rockefeller 12-02-08 12-02-08 JetMet Topology Group Meeting JetMet Topology Group Meeting
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1 Study of Z+Jets background to SUSY LM1 Point Huseyin Topakli University of Çukurova Anwar Bhatti University of Rockefeller Gheorghe Lungu University.
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Study of Z+Jets background Study of Z+Jets background
to SUSY LM1 Pointto SUSY LM1 Point Huseyin TopakliHuseyin Topakli
University of University of ÇÇukurovaukurova
Anwar BhattiAnwar BhattiUniversity of RockefellerUniversity of Rockefeller
Gheorghe Lungu Gheorghe Lungu University of RockefellerUniversity of Rockefeller
12-02-0812-02-08JetMet Topology Group MeetingJetMet Topology Group Meeting
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INTRODUCTIONINTRODUCTION• The Minimal Supersymmetry Model (MSSM) is the minimal
extension of the Standard Model (SM) particle content. Its gauge sector is fully determined by Supersymmetry. The mSUGRA model of supersymmetry is determined by 5 free parameters defined at the Grand Unification (GUT) scale. The free parameters are
In the SUSY signal sample the large MET is resulting from
the two lightest neutralinos in the final states. The missing transverse energy plus multi-jets final state has been a canonical signature for SUSY searches.
parametermixinghiggsnotheofsignthesign
valuesectationvacuumHiggstheofratiothe
couplingtrilinearcommontheA
massgauginocommonthem
scaleGUTtheatmassscalarcommonthem
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Susy LM1 PointSusy LM1 Point
Low mass test points were chosen to evaluate the sensitivity to SUSY signals in the early period of the LHCbut above the Tevatron reach.
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Mgluino ~600 GeV Msquark ~ 550 GeV Xsec ~42 pb
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Decays.Decays.
In the SUSY signal sample The large MET is resulting fromThe two lightest neutralinos in thefinal states.
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Estimation of Z->nunu+Jets using Estimation of Z->nunu+Jets using Z->mumu+Jets.Z->mumu+Jets.
• The ratio will be use to
normalize the Z+Jets Monte Carlo predictions.• When we collect real data, the normalization procedure will be
credible if the MEt shape in the simulation for Z->nunu+2Jets is in good agrement with the MEt shape in the Z->mumu+2Jets data.