模暗物质和INTEGRAL 511 keV线
Modulino Dark Matter and the INTEGRAL 511 keV Line
摘要：
在本文中，我们提出了一个简单的扩展的最小超对称标准模型[MSSM]的“自然”产生的整数光子信号。该模型可以嵌入到SU（5）大统一理论[GUT]与规范介导的超对称性破缺。新的成分是添加了几个MSSM单线态/模量。当单重态的质量处于弱标度时，它们的质量分裂被手征对称性破缺所抑制，并且自然地位于MeV附近。较重的模子衰变为较轻的模子，伴随着电子-正电子对的产生，解释了积分信号。最后，在星系晕中探测到来自内部韧致辐射的弥散伽马射线，将是与511 keV谱线相关的暗物质衰变的暗示性指示，并且是该模型的一个明确的额外预测。
英文摘要：
In this paper we present a simple extension of the minimal supersymmetric standard model [MSSM] which "naturally" produces the INTEGRAL photon signal. The model can be embedded in an SU(5) grand unified theory [GUT] with gauge mediated SUSY breaking. The new ingredients are the addition of several MSSM singlets/moduli. While the masses of the singlets are at the weak scale, their mass splittings are suppressed by chiral symmetry breaking and naturally lie around an MeV. The decay of the heavier modulino to the lighter one with the associated production of electron - positron pairs explains the INTEGRAL signal. Finally, the detection of diffuse gamma rays from internal bremsstrahlung in the galactic halo would be a suggestive indication of dark matter decays associated with the 511 keV line, and is an unambiguous additional prediction of this model.
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