Abstract
A search for pair production of top squark events in proton-proton collisions at a center-of-mass energy of √s = 8 TeV is performed in a sample with a single isolated electron or muon, jets, large missing transverse energy and large transverse mass. The data sample used corresponds to an integrated luminosity of 19.5 fb−1 collected by the CMS experiment. No significant excess in data is observed above the expectation from standard model processes. In the context of supersymmetric models with pair production of top squarks decaying to either a top quark and the lightest supersymmetric particle (LSP) or a bottom quark and a chargino that subsequently decays to a W boson and the LSP, the results probe top squarks with masses up to about 650 GeV for LSP masses up to about 250 GeV.
Highlights
A search for the pair production of top squarks is performed u√sing the pp collision dataset at a center-of-mass energy s = 8 TeV collected by the Compact Muon Solenoid (CMS) experiment [1] at the Large Hadron Collider (LHC) during 2012, corresponding to an integrated luminosity of 19.5 fb−1
The analysis described here is an extension of a previous analysis [17] and more details can be found in reference [18]
The search presented here focuses on a R-parity conserving scenario, where SUSY particles are pair-produced, and the lightest SUSY particle (LSP) is stable and is a candidate dark matter particle
Summary
The resulting signature includes one isolated lepton, four jets, two of which originate from b quarks, and large missing transverse energy (ETmiss) from the two neutralinos. Background events containing a single leptonically decaying W boson are suppressed by requiring that the transverse mass, constructed from the lepton pT and the ETmiss, is much larger than the W mass, MT > 120 GeV.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
