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arXiv 1502.05672hep-phastro-ph.COhep-th
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非热CMSSM与125 GeV希格斯

Non-thermal CMSSM with a 125 GeV Higgs

Luis Aparicio, Michele Cicoli, Bhaskar Dutta, Sven Krippendorf, Anshuman Maharana, Francesco Muia, Fernando Quevedo

摘要:

我们研究了具有非热中性伴子暗物质的CMSSM/mSUGRA的唯象。除了CMSSM的标准参数之外,我们还包括再加热温度作为额外参数。施加辐射电弱对称性破缺与希格斯质量约125 GeV,没有暗物质过剩生产,我们对比的情况下,不同的实验边界从对撞机(LEP,大型强子对撞机),宇宙微波背景(普朗克),直接(LUX,XENON 100,CDMS,IceCube)和间接(费米)暗物质搜索。允许的参数空间的特点是由一个Higgsino-like LSP的质量约300 GeV。观测到的暗物质丰度在2 GeV左右的再加热温度下可以达到饱和,而更高的温度需要额外的非中性伴子暗物质候选者,并扩展了允许的参数空间。Sfermion和Gluino的质量都在几TeV范围内。这些场景可以在隔离超对称破缺的弦模型中实现,避免了宇宙学模量问题,并与规范耦合统一兼容。天体物理学和粒子物理学实验将在不久的将来充分研究这种非热情景。

英文摘要:

We study the phenomenology of the CMSSM/mSUGRA with non-thermal neutralino dark matter. Besides the standard parameters of the CMSSM we include the reheating temperature as an extra parameter. Imposing radiative electroweak symmetry breaking with a Higgs mass around 125 GeV and no dark matter overproduction, we contrast the scenario with different experimental bounds from colliders (LEP, LHC), cosmic microwave background (Planck), direct (LUX, XENON100, CDMS, IceCube) and indirect (Fermi) dark matter searches. The allowed parameter space is characterised by a Higgsino-like LSP with a mass around 300 GeV. The observed dark matter abundance can be saturated for reheating temperatures around 2 GeV while larger temperatures require extra non-neutralino dark matter candidates and extend the allowed parameter space. Sfermion and gluino masses are in the few TeV region. These scenarios can be achieved in string models of sequestered supersymmetry breaking which avoid cosmological moduli problems and are compatible with gauge coupling unification. Astrophysics and particle physics experiments will fully investigate this non-thermal scenario in the near future.

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