A search for anomalous production of events with three or more leptons using 19.5/fb of sqrt(s)=8 TeV LHC data

Collaboration
2013
1 page
Report number:
  • CMS-PAS-SUS-13-002
Experiments:

Citations per year

2013201420152016201705101520
Abstract:
A model-independent search for physics beyond the standard model in events with at least three leptons is presented. The data sample corresponds to 19.5\,fb1^{-1} of integrated luminosity in pp collisions at s=8\sqrt{s}=8 TeV collected by the CMS experiment at the LHC in 2012. Data is binned in exclusive channels characterized by lepton charge and flavor combinations, the magnitude of missing transverse energy and jet activity in the event, the invariant mass of opposite-sign lepton pairs consistent or inconsistent with decay of a ZZ boson, and the presence or absence of b-quarks and taus. The observations are consistent with expectations from standard model processes. We characterize the sensitivity of this analysis to new physics by interpreting the results in various supersymmetric models that yield multilepton final states including ones with Higgs bosons arising from supersymmetric decays. Finally, we place a 95\% confidence level limit on the branching ratio for tcht \rightarrow ch decays. We find that BR(tch)<0.31%\textrm{BR}(t \rightarrow ch) < 0.31\%, corresponding to a bound on the top-charm flavor violating Higgs Yukawa couplings of λtch2+λcth2<0.10\sqrt{|\lambda_{tc}^h|^2 + |\lambda_{ct}^h|^2} < 0.10.
Note:
  • Preliminary results
  • Data
  • lepton: multiplicity
  • lepton: charge
  • flavor: violation
  • coupling: Yukawa
  • transverse energy: missing-energy
  • p p: scattering
  • CERN LHC Coll
  • supersymmetry
  • Higgs particle: coupling