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Dielectron Spectrum Analysis Progress Report

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Update on dielectron spectrum analysis progress, including background samples, event weighting, and trigger requirements. Comparison of efficiencies between Upsilon and particle gun samples planned.

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Dielectron Spectrum Analysis Progress Report

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  1. Dielectron Spectrum Analysis J. Leonard 12 August 2009

  2. Today • Action items from e-mail: • Move to DY analysis • For backgrounds use EM or heavy flavor enriched from summer 08 • Coordinate sample list with Sridhara • Mostly done • Figure out event weighting • In progress • Require trigger for samples • If you are using 2 series use single electron trigger • Start looking at electron selection variables when samples and normalization under control • Add plots to Upsilon Trigger Note (2nd priority) • Done • The Efficiency for Upsilons and particle gun is quite different. • Compare efficiency official Upsilon and particle gun sample

  3. Data Samples • Signal • /Zee_M20/Summer08_IDEAL_V11_redigi_v1/AODSIM • Background • /Ztautau_M20/Summer08_IDEAL_V11_redigi_v1/AODSIM • /QCD_EMenriched_Pt20to30/Summer08_IDEAL_V11_redigi_v2/AODSIM • /QCD_EMenriched_Pt30to80/Summer08_IDEAL_V11_redigi_v2/AODSIM • /QCD_EMenriched_Pt80to170/Summer08_IDEAL_V11_redigi_v1/AODSIM • /QCD_BCtoE_Pt20to30/Summer08_IDEAL_V11_redigi_v1/AODSIM • /QCD_BCtoE_Pt20to80/Summer08_IDEAL_V11_redigi_v1/AODSIM • /QCD_BCtoE_Pt80to170/Summer08_IDEAL_V11_redigi_v1/AODSIM • W+jets… • ttbar… • Will look at recent inclusive Z analysis (CMS AN-2009/098)

  4. Invariant Mass: Signal events • Scaled to 100 pb-1 • Scaling factor k = (Lscaled * )/nevents • Rest of background samples in progress. . .

  5. Next Steps • Rerun code with full list of Summer08 samples • Continue work on scaling samples correctly • Get trigger bit info (make sure it passes HLT path -- single electron) • When those done, start looking at electron selection variables

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