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The purpose of this paper is to examine the model dependence of the stringentconstraints on the gluino mass obtained from the Large Hadron Collider (LHC)experiments by analyzing the Run II data using specific simplified models basedon several ad hoc sparticle spectra which cannot be realized even in the fairlygeneric pMSSM models. We first revisit the bounds on the gluino mass placed bythe ATLAS collaboration using the $1l + jets + \met$ data. We show that theexclusion region in the $M_{\widetilde{g}}-M_{\widetilde{\chi}^0_1}$ plane inthe pMSSM scenario sensitively depends on the mass hierarchy between the leftand right squarks and composition of the lighter electroweakinos and, to alesser extent, other parameters. Most importantly, for higgsino type lighterelectroweakinos (except for the LSP), the bound on the gluino mass from thischannel practically disappears. However, if such models are confronted by theATLAS $jets + \met$ data, fairly strong limits are regained. Thus in the pMSSMan analysis involving a small number of channels may provide more reliable masslimits. We have also performed detailed analyses on neutralino dark matter (DM)constraints in the models we have studied and have found that for a significantrange of LSP masses, the relic density constraints from the WMAP/PLANCK dataare satisfied and LSP-gluino coannihilation plays an important role in relicdensity production. We have also checked the simultaneous compatibility of themodels studied here with the direct DM detection, and the LHC constraints.

Revisiting the gluino mass limits in the pMSSM in the light of the latest LHC data and Dark Matter constraints