Higgs Tau Tau JET MET Analysis Status

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Higgs ? Tau TauJET MET Analysis Status

• U. Akgun, F. Duru, S. Kunori
• USCMS Local Physics Meeting
• Fermilab, 4/27/2005

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Decay Channels

• bbA/H ? 2tau ? ll
• bbA/H ? 2tau ? lj
• bbA/H ? 2tau ? jj
• qq ? qqH ? 2tau ? ll
• qq ? qqH ? 2tau ? lj
• qq ? qqH ? 2tau ? jj

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bbA/H ? 2tau ? ll

• Signal
• 140 GeV, 38k Events
• 200 GeV, 20k Events
• 250 GeV, 10k Events
• Backgrounds (250k each)
• hg03_zg80_100_2tau_2l
• hg03_zg100_2tau_2l

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High Et and Low Et B-Quarks
High Et 32 GeV Low Et 10 GeV
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Low Et and High Et B-Quark Eta
The 2 B-Jets are more likely to have opposite
eta signs
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RecJet5 Et and Eta (Before Matching)
RecJet5 Eta and EtaCorrTrack Distributions are
exactly same.
Et 22.6 GeV EtCorr 30.7 GeV EtCorrGamma
34.3 GeV EtCorrTrack 22.6 GeV EtCorrV1 29.4
Et and EtCorrTrack distributions are almost same.
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Matching RecJet5 (?R lt 0.4)

• Out of 20000 Events
• Only 1460 Events have 2 matching RecJet5s
• 6460 Events have 1 matching Jet

0.4
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Matching RecJet5 Et and Eta
Et 29 GeV EtCorr 38 GeV EtCorrGamma 43
GeV EtCorrTrack 29 GeV EtCorrV1 40 GeV
Matching RecJet5 Eta and EtaCorrTrack Are exactly
same. We match mainly high Et B-quarks.
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In Case of 2 Matching Jet
High Et b-jet 49.5 GeV Low Et b-jet 20.3 GeV

• The High Et vs Low Et
• Eta distribution do not look like B-Quarks.
• Not enough statistics
• We do not have forward jets

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B-Quark Et Matching Jet Et Ratio
EtCorrGamma, EtCorr, and EtCorrV1seems to Match
better
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Leptons Neutrinos

• Leptons and Neutrinos are at central region
• The neutrinos are very close to sister lepton
• The lepton Et mean 37 GeV.
• No tracker simulation.

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Reconstructed Missing Et
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Reconstructed Missing Et
First three are very similar, MET from KtJets is
higher than the others.
Pt Sum of Neutrinos give Mean 31 GeV.
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Reconstructed Higgs Mass
Rec Mass with MET from Kt Jets 157 GeV Rec.
Mass with MET from IC Jets 124 GeV Rec. Mass
with MET CaloRecHits 124 GeV Rec. Mass with
MET ECalHCalTower 124 GeV Rec. Mass with just
lepton info 79 GeV
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NEXT ??

• - Well investigate the cuts
• Lepton Pt, Angle between leptons, Jet Et, MET,
  etc
• - Try other jet algorithms, cone sizes.
• MET Corrections.
• - Background channels, Drell-Yan sample ready.
• qqH135 ? tautau ? ll (10k ready)
• qqH135 ? tautau ? lj (10k ready)
• 2 new grad students, busy summer..
• Warren Clarida, Anthony Moeller

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Backup
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Backup
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