Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions

The ATLAS collaboration
Aad, Georges , Abajyan, Tatevik , Abbott, Brad , Abdallah, Jalal , Abdel Khalek, Samah , Abdelalim, Ahmed Ali , Abdinov, Ovsat , Aben, Rosemarie , Abi, Babak , Abolins, Maris
Phys.Lett.B 720 (2013) 13-31, 2013.

Abstract (data abstract)
CERN-LHC. Study of events from proton-proton interactions at a centre-of-mass energy of 7 TeV which have final states comprising exclusively one or two leptons (either electrons or muons), large missing transverse momentum, light flavour jets and b-jets. The data sample used has an integrated luminosity of 4.7 fb-1. The data are analysed in the framework of MSSM assuming the top squark decays exclusively to a chargino and b-quark. The data is divided into three signal regions, one (1LSR) requiring only one lepton with two light-quark jets and 2 b-jets, and two (2LSR1 and 2LSR2) requiring only two leptons and two leading jets with different requirements on the minimum energy and invariant mass of the specific subsystem from the hard-scattering process. The reader is refered to the text of the paper for more details.

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