Search for pair production of gluinos decaying via stop and sbottom in events with b -jets and large missing transverse momentum in pp collisions at √s=13 TeV with the ATLAS detector

Aad, G. and Abbott, B. and Abdallah, J. and Abdinov, O. and Abeloos, B. and Krasznahorkay, Attila and Pásztor, Gabriella and Tóth, József (2016) Search for pair production of gluinos decaying via stop and sbottom in events with b -jets and large missing transverse momentum in pp collisions at √s=13 TeV with the ATLAS detector. PHYSICAL REVIEW D, 94 (3). ISSN 2470-0010

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Abstract

A search for Supersymmetry involving the pair production of gluinos decaying via third- generation squarks to the lightest neutralino ( ˜χ0 1) is reported. It uses an LHC proton–proton dataset at a center-of-mass energy √s = 13 TeV with an integrated luminosity of 3.2 fb−1 collected with the ATLAS detector in 2015. The signal is searched for in events contain- ing several energetic jets, of which at least three must be identified as b-jets, large missing transverse momentum and, potentially, isolated electrons or muons. Large-radius jets with a high mass are also used to identify highly boosted top quarks. No excess is found above the predicted background. For ˜χ0 1 masses below approximately 700 GeV, gluino masses of less than 1.78 TeV and 1.76 TeV are excluded at the 95% CL in simplified models of the pair pro- duction of gluinos decaying via sbottom and stop, respectively. These results significantly extend the exclusion limits obtained with the √s = 8 TeV dataset.

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