Data results for inclusive all-hadronic (RA with 318 nb -1 SUSY Hadronic/GMSB Meeting [C. Rogan et al.] Data Plots Towards Jamboree Introduction and full analysis path + full MC analysis shown by Chris yesterday AN- will appear very soon (possibly next week)
CMS DATA Fully-Inclusive Hadronic SUSY Search [C.Rogan et. al.] New variables to be used together for discovery and characterization of SUSY Doesn’t involve MET Uses both transverse and longitudinal information Peaks for signal events - falls exponentially for backgrounds Dimension-less - for S/B discrimination Suppresses backgrounds and shapes distributions in the variable in a predictable and well- understood way - the Razor SUSY LM1 Alpgen QCD N.B. Good Data/MC agreement w/ ALPGEN - NOT w/ Pythia (see backup)
Analysis using these variables sensitive to SUSY LM1 with ~10 pb -1 of data for PF jet, Calo jet and/or Track jet analysis (JPT in progress) PF Jets Track Jets Calo Jets MR Peaks for signal events - falls exponentially for backgrounds in all cases (see also back-up)
4 Exponential behavior invariant under cleaning procedure Min-Bias data from June 16th ReReco Variables robust against detector mis-measurements/noise/spurious effects Data/MC comparisons in control regions towards background estimations (Loose R cuts + different control regions = over- constrained bkg yields in signal region)
BACK-UP SLIDES
6 Selection/Sample Details For everything shown in this talk: 7 TeV MC (see back-up slide for list of samples) 7 TeV Data (up to run right now ~318 nb -1 ) OR of HT200 and Jet110 triggers (for the moment) PF MET used (tcMET or corrected caloMET fine too) Require di-jets satisfying (parallel analyses): NO explicit lepton/photon reco or ID in constructing these variables If > 2 reco jets, form two hemispheres by minimizing invariant masses added in quadrature (see back-up slides) Corrected Calo jets Corrected PF jetsUncorrected Track jets Loose jet ID Only high quality tracks w/ vertex consistent with reco PV considered for clustering
7 The Razor in data (I) PF jets
M R and R in Data (II) 8 CMS DATA Alpgen QCD MC Behavior of M R and R is confirmed with data both qualitatively and quantitatively
9 Loose R, PF Jet Analysis (318 nb -1 )
10 Loose R, PF Jet Analysis (318 nb -1, )
11 Tighter R, PF Jet Analysis (318 nb -1 )
12 Tighter R, PF Jet Analysis (318 nb -1 )
13 Towards Backgrounds Estimations Using a loose R-cuts we have a QCD dominated sample which we can use to measure the QCD slope, as a function of R-cut, in the low M R region Can do this in any region with QCD population in low M R QCD background control sample from data
14 SUPER-PRELIMINARY Discovery Potential 14 3 Observation5 Discovery Here, we look at estimated sensitivity for a PF Jets based search, doing a counting experiment and estimating systematic uncertainty assuming ratios of events in control regions to signal region (conservative estimate) Sensitivity comparable for each jet type considered