10 GeV neutralino dark matter and light stau in the MSSM
10 GeV neutralino dark matter and light stau in the MSSM
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DOI：
10.1103/physrevd.89.015023
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发表时间：
2013-08
影响因子：
5
通讯作者：
K. Hagiwara;S. Mukhopadhyay;Junya Nakamura
中科院分区：
文献类型：
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作者：
K. Hagiwara;S. Mukhopadhyay;Junya Nakamura
最近有人指出，在费米泡低纬度观测到的伽马射线发射的一个组成部分具有光谱形状，可以用10 GeV暗物质（DM）湮灭成2 × 10^{-27} cm^3/s的τ轻子来解释。在这种可能性的激励下，我们通过状态交换重新审视了MSSM中10gev中性中微子DM的湮灭。所需的状态质量和混合，与LEP直接搜索和电弱精度约束一致，与希格斯衰变率可能提高到两个光子相关。我们还探讨了这种情况对DM遗迹密度和μ子异常磁矩的影响，考虑到最近的ATLAS对电荷和前两代睡眠质量的限制，以及对10 GeV中性中微子的希格西诺分数的限制。
It has recently been pointed out that a component of the observed gamma ray emission in the low-latitudes of Fermi Bubble has a spectral shape that can be explained by a 10 GeV dark matter (DM) annihilating to tau leptons with a cross-section of 2 x 10^{-27} cm^3/s. Motivated by this possibility, we revisit the annihilation of a 10 GeV neutralino DM in the MSSM via stau exchange. The required stau masses and mixing, consistent with LEP direct search and electroweak precision constraints, are correlated with a possible enhancement of the Higgs decay rate to two photons. We also explore the implications of such a scenario for DM relic density and the muon anomalous magnetic moment, taking into account the recent ATLAS bounds on the chargino and the first two generation slepton masses, as well as the constraints on the Higgsino fraction of a 10 GeV neutralino.