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arXiv 1407.1827hep-ph
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轴子暗物质与模诱导重子发生

Axino Dark Matter in Moduli-induced Baryogenesis

Koji Ishiwata

摘要:

我们考虑大R宇称破坏(RPV)的轴子暗物质。在模主导宇宙中,轴子是通过热或非热的方式产生的,然后衰变后期的模稀释了轴子密度,从而得到了解释当前暗物质的丰度。与此同时,重子不对称性是由于模诱导的重子生成通过大的RPV产生。尽管RPV很大,但Axino在宇宙学上是稳定的,因为它的衰变速率受到轴子衰变常数、重夸克质量或运动学的抑制。

英文摘要:

We consider axino dark matter in large R-parity violation (RPV). In moduli-dominated universe, axino is produced thermally or non-thermally via saxion decay, then late-decaying moduli dilute axino density, which results in the right abundance to explain the present dark matter. At the same time baryon asymmetry is generated due to moduli-induced baryogenesis via the large RPV. Axino is cosmologically stable in spite of the large RPV since its decay rate is suppressed by the axion decay constant, heavy squark mass or kinematics.

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