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arXiv 1507.07008hep-ph
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根据费米GeV过剩对pMSSM的整体分析:LHC运行-II和天体粒子实验的前景

Global analysis of the pMSSM in light of the Fermi GeV excess: prospects for the LHC Run-II and astroparticle experiments

Gianfranco Bertone, Francesca Calore, Sascha Caron, Roberto Ruiz de Austri, Jong Soo Kim, Roberto Trotta, Christoph Weniger

摘要:

我们提出了一个新的19维唯象最小超对称标准模型(pMSSM-19)的全局拟合,它符合暗物质间接、直接和加速器暗物质搜索的所有最新实验结果.我们证明,该模型对费米大面阵望远镜观测到的银河系中心γ射线过剩现象提供了满意的解释,并假定它是由银河系晕中的中性伴子湮灭产生的。我们确定了两个区域,通过所有的限制:第一个对应的质量~80-100 GeV的中性伴子湮灭到WW的分支比为95% ;第二个较重的中性伴子,质量~180-200 GeV的湮灭到t tbar的分支比为87%。我们表明,与银河系中心GeV过剩兼容的中性伴子将很快在LHC运行II的范围内-特别是通过搜索charginos和中性伴子,squarks和轻smuons -以及Xenon 1 T,这要归功于其对中子自旋相关截面的前所未有的敏感性。

英文摘要:

We present a new global fit of the 19-dimensional phenomenological Minimal Supersymmetric Standard Model (pMSSM-19) that comply with all the latest experimental results from dark matter indirect, direct and accelerator dark matter searches. We show that the model provides a satisfactory explanation of the excess of gamma-rays from the Galactic centre observed by the Fermi~Large Area Telescope, assuming that it is produced by the annihilation of neutralinos in the Milky Way halo. We identify two regions that pass all the constraints: the first corresponds to neutralinos with a mass ~80-100 GeV annihilating into WW with a branching ratio of 95% ; the second to heavier neutralinos, with mass ~180-200 GeV annihilating into t tbar with a branching ratio of 87%. We show that neutralinos compatible with the Galactic centre GeV excess will soon be within the reach of LHC run-II -- notably through searches for charginos and neutralinos, squarks and light smuons -- and of Xenon1T, thanks to its unprecedented sensitivity to spin-dependent cross-section off neutrons.

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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