Search for Chargino and Neutralino

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Search for Chargino and Neutralino
Trilepton channel in mSUGRA scenario

• Signal acceptance
• SUSY MC
• b-bar/c-cbar MC

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SUSY MC acceptance study

• ISAJET Sample
• n. events 30329
• 2 muons (electrons) per event
• min ET 4 GeV
• abs(eta) lt 2
• mSUGRA parameters
• m12180,m0100, mgt0, A00, tgb5
• chargino above LEP2 limit (m 114 GeV)

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Pt distribution for the 3 muons
Mean pt 35.48 GeV Mean pt 16.67 GeV Mean pt
10.81 GeV
Offline info
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Eta distribution for the 3 muons
First muon Second muon Third muon
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Phi distribution for the 3 muons
First muon Second muon Third muon
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Fiducial cuts

• Fiducial cuts
• Pt gt 4
• Abs(eta)lt1
• For each Chargino-Neutralino decay mode
• e_ee
• e_?
• ? _ee
• ?_ ? ?

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Pt distribution for the e in decay mode
e_ee
Events with 3 leptons
Events with 3 fiducial leptons
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Fiducial cuts efficiency
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b-bbar/c-cbar MC acceptance study
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b-bbar/c-cbar MC acceptance study
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b-bbar/c-cbar MC acceptance study
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b-bbar/c-cbar MC acceptance study
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Next Steps

• ACCEPTANCE
• Study of the backgrounds
• Drell Yan
• DiBoson
• Understand the fake rate
• Study of the cut efficiency vs MET
• Emulate the trigger efficiency
• Generate other 2 SUSY MC samples (chargino mass
  below and at LEP2 limit)