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Background control for H→ZZ→2l2j

Background scaled to 1fb-1. Background control for H→ZZ→2l2j. Signal scaled to same area. Fit to mZZ distribution to separate background (Z+jets continuum) from signal peak. eg, unbinned maximum likelihhod fit with pdf taken from:. g +jets data. mjj sidebands in data. MC.

katalin-molnar
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Background control for H→ZZ→2l2j

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  1. Background scaled to 1fb-1 Background control for H→ZZ→2l2j Signal scaled to same area • Fit to mZZ distribution to separate background (Z+jets continuum) from signal peak eg, unbinned maximum likelihhod fit with pdf taken from: • g+jets data • mjj sidebands in data • MC ~17% effect on UL due to different MCs

  2. Z+jets measurement in CMS Good agreement with Madgraph (as expected, sizable disagreement with Pythia) • leptons inside acceptance with: pT > 10,20 GeV std quality cuts and isolation • PFjets inside acceptance with: pT > 30 GeV std loose quality uts • Comparison with H→ZZ→2l2j phase space: • ~same lepton acceptance (pT>20,20 GeV), • same jets acceptance • → require at least 2 jets with mjj ~ mZ Since jets pt shape agree with madgraph, this Higgs phase space is well modeled

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