SUSY Discovery at 10 TeV

1
SUSY Discovery at 10 TeV?

• UCL Atlas Meeting 2nd May 2008

2
Introduction

• 10 TeV run coming soon (3-4 months long? Could
  get 100 pb-1?)
• Our low-jet-multiplicity SUSY studies have
  potential for early data
• - so what about at 10TeV could we hope to see
  something?

• Currently no Monte Carlo BUT can reweight
  existing 14TeV MC

For particular configuration with s,t,u should
just need to change the probablity that incoming
partons had that configuration i.e. just a PDF
reweight
xi x of parton i at 14TeV x i x of parton i
at 10TeV
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Check of Method
Example Check SU3 SUSY events generated in
ATLFAST
Red is the reweighted sample

• pretty good agreement!
• weights all lt 1

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Event Selection
CSC5 2-/3-Jet0leptonMET SUSY analyses
For simplicity, just use our CSC5-style 2- and
3-Jet analyses full details in note
Effective Mass Meff ? pTJet,i MET (sum
runs over 2(3) highest-pT jets)
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Results 2-Jet0-leptonMET
CSC5 analysis 14 TeV, 100pb-1
?s 14 TeV
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Results 2-Jet0-leptonMET
REWEIGHTED to 10 TeV
CSC5 analysis 14 TeV, 100pb-1
?s 14 TeV
?s 10 TeV
? SUSY signal (SU3) reduced by factor of 2.9 ?
SM background reduced by factor of 2.3
Compared to 14 TeV
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Results 2-Jet0-leptonMET
REWEIGHTED to 10 TeV
CSC5 analysis 14 TeV, 100pb-1
?s 14 TeV
?s 10 TeV
? a few other mSUGRA points
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BackUps
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Results 3-Jet0-leptonMET
REWEIGHTED to 10 TeV
CSC5 analysis 14 TeV, 100pb-1
?s 14 TeV
?s 10 TeV
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Results 3-Jet0-leptonMET
REWEIGHTED to 10 TeV
CSC5 analysis 14 TeV, 100pb-1
?s 14 TeV
?s 10 TeV