Abstract
A search is presented for physics beyond the standard model in final states with two opposite-sign same-flavor leptons, jets, and missing transverse momentum. The data sample corresponds to an integrated luminosity of 19.4 inverse femtobarns of proton-proton collisions at sqrt(s) = 8 TeV collected with the CMS detector at the CERN LHC in 2012. The analysis focuses on searches for a kinematic edge in the invariant mass distribution of the opposite-sign same-flavor lepton pair and for final states with an on-shell Z boson. The observations are consistent with expectations from standard model processes and are interpreted in terms of upper limits on the production of supersymmetric particles.
Highlights
Detector and triggerThe central feature of the CMS detector is a superconducting solenoid of 6 m internal diameter that produces an axial magnetic field of 3.8 T
Background estimatesThe principal SM backgrounds are divided into two categories
We interpret the results of the search for a kinematic edge in the context of simplified models consisting of bottom-squark pair production, with each bottom-squark b decaying to a bottom quark and the plane for two scenarios
Summary
The central feature of the CMS detector is a superconducting solenoid of 6 m internal diameter that produces an axial magnetic field of 3.8 T. Iron and quartz-fiber hadron calorimeters are located outside the magnetic field volume, within each endcap region of the detector. The ee and μμ triggers collect signal candidate data while the eμ trigger collects data used in the backgrounddetermination procedure, as described below. These triggers require at least one electron or muon with transverse momentum pT > 17 GeV, and another with pT > 8 GeV. Their efficiencies after event selection (>90%) are measured in data and are accounted for in the analysis. The efficiencies of the ee, μμ, and eμ triggers differ by only a few percent in the kinematic range of this search
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