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SUSY Searches with Multileptons

SUSY Searches with Multileptons. Elliott Cheu , Caleb Lampen , Prolay Mal. SUSY Multilepton Search ( Cheu , Lampen ). Search for SUSY decays with three or more leptons, jets and missing E T Promising because of low backgrounds and good sensitivity Contributions:

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SUSY Searches with Multileptons

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  1. SUSY Searches with Multileptons Elliott Cheu, Caleb Lampen, Prolay Mal

  2. SUSY MultileptonSearch (Cheu, Lampen) Search for SUSY decays with three or more leptons, jets and missing ET Promising because of low backgrounds and good sensitivity Contributions: Early data analysis 34 pb-1: Validation of analysis and systematic studies. ATLAS-COM-CONF-2011-039 Full 2 fb-1 analysis: Trigger studies and fake rate studies ATLAS-COM-CONF-2011-144 and ATLAS-COM-PHYS-2011-1561 Optimization using multivariate analysis: 2 fb-1 Caleb Lampen's thesis. E. Cheu - The ATLAS Experiment 2

  3. SUSY Multilepton Search • Trigger efficiencies • For EF_e20_medium using tag and probe method on Z to ee events • Weight map = f(Et, h, f) validated and used in the analysis • Three lepton MSUGRA limits • Parameter space exclusion will significantly increase with full 2011 data set

  4. Light Charged Higgs Decays (Cheu, Mal) • In MSSM it is possible for mH < mt • t → bH • For tan b > 1, H→ tnt is favored • Our contributions: • Sensitivity study: With 1 fb-1 at 7 TeV, we should have siginificant improvement over FNAL • ATL-COM-PHYS-2010-236 • Data/MC study: 1 fb-1 study of important variables • ATL-COM-PHYS-2011-187 • Full Analysis: Fake rates and background studies for 1 fb-1 analysis • ATL-PHYS-INT-2011-093

  5. CSC Electronic Calibration • Our contributions: Cheu, Lampen, Leone, Mal • Develop and maintain calibration software and related procedures. • Develop database to store all data. • Develop monitoring tools to check validity of data and constants. • Check validity of calibration process. • In situ alignment of CSC chambers • Global χ2 alignment method E. Cheu - The ATLAS Experiment

  6. Large Synoptic Survey Telescope • Camera • UAbuilding camera power supplies • First prototype layout done • UA also providing control software (Johns, Lei) • Weak Lensing • Map distribution of dark matter to distinguish models of Dark Energy • Our efforts: • Understand effects of photometric-z on Dark Energy signal • Postdoc: A. Abate – UA Funding

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