Search for Anomalous Production of Multilepton Events in pp Collisions at √s = 7 TeV

Abstract

We present a search for anomalous production of events with three or more isolated leptons in pp collisions at √s = 7 TeV collected by the CMS experiment at the LHC during the 2011 run. We analyze a data sample corresponding to 4.7 fb^-1 of integrated luminosity. The search is applicable to any model of new physics that enhances multiple lepton production. The observed multilepton events are categorized into exclusive search channels based on the identity and kinematics of the objects in the events. A data-based estimation of the standard-model background rates is emphasized, but simulation is also used to estimate some of the background predictions where appropriate. The search results are interpreted in the context of supersymmetry, including both R-parity-conserving and R-parity-violating models. From these models, we derive exclusion limits as a function of squark and gluino masses.

Link to Publication

http://dx.doi.org/10.1007/JHEP06(2012)169

Approved Plots from EXO-11-045 and SUS-11-013 (Click on blue names in the right column to download files)

Note: The plots are in the following order:

• Tables with Final Event Yields

• Exclusion Plots

• TTbar control channel ST plots

• Background plots for channels with ST binning

• Background plots for channels with MET-HT binning

• Lepton Fake-rate Plots

• Relative Isolation Plots

• Three-lepton ST, MET and HT plots

Figure	Abbreviated Caption
	ReRecoRA7_Paper_Formatted.pdf: Table for MET-HT Binning
	ReRecoRPV_Paper_Formatted.pdf: Table for ST Binning
	exclu_conlsp4.7.pdf: Exclusion Plot for coNLSP Scenario (See Paper for more details)
	exclu_hadrpv4.7.pdf: Exclusion Plot for Hadronic RPV (See Paper for more details)
	exclu_leprpv4.7.pdf: Exclusion Plot for Leptonic RPV (See Paper for more details)
	SRAttbar_STgt400_CMS_LOG.pdf: Mono-lepton ttbar control channel
	SRAseedelmuq0_STgt400_CMS_LOG.pdf: Di-lepton ttbar control channel
	L3T0_DD_RPV_CMS.pdf: Background breakdown for ST Binning: 3-lepton (0 Taus) Channels
	L3T1_DD_RPV_CMS.pdf: Background breakdown for ST Binning: 3-lepton (1 Tau) Channels
	L3T2_DD_RPV_CMS.pdf: Background breakdown for ST Binning: 3-lepton (2 Taus) Channels
	L4T0_DD_RPV_CMS.pdf: Background breakdown for ST Binning: 4-lepton (0 Taus) Channels
	L4T1_DD_RPV_CMS.pdf: Background breakdown for ST Binning: 4-lepton (1 Tau) Channels
	L4T2_DD_RPV_CMS.pdf: Background breakdown for ST Binning: 4-lepton (2 Taus) Channels
	L3T0_DD_RA7_CMS.pdf: Background breakdown for MET-HT Binning: 3-lepton (0 Taus) Channels
	L3T1_DD_RA7_CMS.pdf: Background breakdown for MET-HT Binning: 3-lepton (1 Tau) Channels
	L3T2_DD_RA7_CMS.pdf: Background breakdown for MET-HT Binning: 3-lepton (2 Taus) Channels
	L4T0_DD_RA7_CMS.pdf: Background breakdown for MET-HT Binning: 4-lepton (0 Taus) Channels
	L4T1_DD_RA7_CMS.pdf: Background breakdown for MET-HT Binning: 4-lepton (1 Tau) Channels
	L4T2_DD_RA7_CMS.pdf: Background breakdown for MET-HT Binning: 4-lepton (2 Taus) Channels
	SRAttbarjetMuUNBIASED_relIso_CMS_LINEAR.pdf: Isolation Distribution of muons with large impact parameter (>0.02 cm, primarily from jets)
	dd_fsr_plot.pdf: Trilepton invariant mass distribution after all other selections for channel.
	dd_ST_plot.pdf: The ST distributions for three-lepton events passing all selection criteria for the three lepton, no-τ channel, except ST: Z decays included.
	dd_ST_plotZV.pdf: The ST distributions for three-lepton events passing all selection criteria for the three lepton, no-τ channel, except ST: Z-veto applied.
	dd_SUSY_ht_plot.pdf: The HT distribution for three-lepton events (excluding taus and MET>50) passing all selection criteria: Z decays included
	dd_SUSY_ht_plotZV.pdf: The HT distribution for three-lepton events (excluding taus and MET>50) passing all selection criteria: Z-veto applied
	dd_SUSY_met_plot.pdf: The MET distribution for three-lepton events (excluding taus and HT<200) passing all selection criteria: Z decays included
	dd_SUSY_met_plotZV.pdf: The MET distribution for three-lepton events (excluding taus and HT<200) passing all selection criteria: Z-veto applied

Reinterpretation in simplified models (see the CMS-PAS-SUS-11-016 for the description).

Links to documentation in CDS

• CMS-PAS-SUS-11-013
• CMS-PAS-EXO-11-045

-- SanjayArora - 30-Apr-2012