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arXiv 1107.2573hep-phhep-ex
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Yukawa统一模型中对NLSP Gluino和暗物质Neutralino的LHC约束

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

M. Adeel Ajaib, Tong Li, Qaisar Shafi

摘要:

ATLAS实验最近公布了它对包含喷流和/或b-喷流且缺少横向动量的最终状态的搜索结果,对应于165 pb^{-1}的积分亮度。我们利用这些数据约束了一类具有t-b-τYukawa统一的超对称SU(4)_c × SU(2)_L × SU(2)_R模型,其中胶子是次轻超对称粒子(NLSP). NLSP胶子比LSP暗物质中性伴子重约10-30%,它主要衰变为后者和夸克-反夸克对或胶子。我们发现,NLSP胶子质量低于~300 GeV被排除的ATLAS数据。对于LSP中性伴子质量~200-300 GeV和μ>0,其中μ是MSSM希格斯双线性项的系数,在某些情况下,LHC对自旋相关(自旋无关)中性伴子-核子截面的约束比IceCube DeepCore(Xenon 1 T/SuperCDMS)的预期边界要严格得多。对于μ<0,这也适用于自旋相关的截面。

英文摘要:

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-τYukawa 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 μ>0, where μis 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 μ<0, this also holds for the spin-dependent cross sections.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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