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arXiv · 1107.2573

LHC Constraints on NLSP Gluino and Dark Matter Neutralino in Yukawa Unified Models

M. Adeel Ajaib·Tong Li·Qaisar Shafi
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Abstract

The ATLAS experiment has recently presented its search results for final states containing jets and/or b-jet(s) and missing transverse momentum, corresponding to an integrated luminosity of 165 pb^{-1}. We employ this data to constrain a class of supersymmetric SU(4)_c X SU(2)_L X SU(2)_R models with t-b-\tau Yukawa unification, in which the gluino is the next to lightest supersymmetric particle (NLSP). The NLSP gluino is slightly (~10-30%) heavier than the the LSP dark matter neutralino, and it primarily decays into the latter and a quark-antiquark pair or gluon. We find that NLSP gluino masses below ~300 GeV are excluded by the ATLAS data. For LSP neutralino mass ~200-300 GeV and \mu>0, where \mu is the coefficient of the MSSM Higgs bilinear term, the LHC constraints in some cases on the spin-dependent (spin-independent) neutralino-nucleon cross section are significantly more stringent than the expected bounds from IceCube DeepCore (Xenon 1T/SuperCDMS). For \mu<0, this also holds for the spin-dependent cross sections.

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M. Adeel Ajaib, Tong Li, Qaisar Shafi. 2011-07-13. LHC Constraints on NLSP Gluino and Dark Matter Neutralino in Yukawa Unified Models. https://doi.org/10.1016/j.physletb.2011.09.083

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