Current experimental bounds on stop mass in natural SUSY

Abstract

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Motivated by the recent progress of direct search for the productions of stop pair and sbottom pair at the LHC, we examine the constraints of the search results on the stop (... ^sub 1^) mass in natural SUSY. We first scan the parameter space of natural SUSY in the framework of MSSM, considering the constraints from the Higgs mass, B-physics and electroweak precision measurements. Then in the allowed parameter space we perform a Monte Carlo simulation for stop pair production followed by ... ^sub 1^ [arrow right] t ... or ... ^sub 1^ [arrow right] b ... and sbottom pair production followed by ... ^sub 1^ [arrow right] b ... or ... ^sub 1^ [arrow right] t .... Using the combined results of ATLAS with 20.1 fb^sup -1^ from the search of + jets + [InlineMediaObject not available: see fulltext.]^sub T^ , hadronic ... + [InlineMediaObject not available: see fulltext.]^sub T^ and 2b + [InlineMediaObject not available: see fulltext.]^sub T^ , we find that a stop lighter than 600 GeV can be excluded at 95% CL in this scenario.