SUSY search with two same-sign leptons and jets with the ATLAS detector using 21 fb−1of pp collisions at 8 TeV

Otilia Ducu, L. Bravina, Y. Foka, S. Kabana
2014 EPJ Web of Conferences  
A search for the production of supersymmetric particles decaying into final states with jets, b-jets, missing transverse momentum and two isolated leptons, e or μ, with the same electric charge (same-sign leptons) is presented. The analysis uses a data sample collected during 2012, which corresponds to a total integrated luminosity of 20.7 fb −1 of √ s = 8 TeV proton-proton collisions recorded with the ATLAS detector at the Large Hadron Collider. No significant deviation from the Standard Model
more » ... the Standard Model expectation is observed in any of these signal regions. Exclusion limits are derived for a mSUGRA/CMSSM model, and for a wide variety of simplified models of supersymmetry. The ATLAS result on which this note is based significantly extends previous exclusion limits.. * 1 , withb 1 →tχ + 1 , can give final states with 4 W bosons, 2 bottom quarks and 2 neutralinos. Several scenarios are also considered forgg decays to gauginos through squarks from the two first generations, viag → qqχ ± 1 → qqW ±χ0 1 or sleptonsg → qqχ ± 1 → qqlν/lν (or g → qqχ 0 2 → qqll/νν) withl → lχ 0 1 andν → νχ 0 1 . In these cases, advantage is taken of the Majorana nature of the gluino and q andq (or l andl) can be obtained in the final state. Therefore this enhances a
doi:10.1051/epjconf/20147100043 fatcat:xqlb5rju5batrfjmx5xnixjtlu