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arXiv 1202.4067hep-phastro-ph.CO
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规范介导下Q球衰变引起的轴子暗物质和重子数不对称性

Axino dark matter and baryon number asymmetry from Q-ball decay in gauge mediation

Shinta Kasuya, Etsuko Kawakami, Masahiro Kawasaki

摘要:

我们研究了规范介导的超对称破缺中Q球衰变到轴子暗物质的过程。在我们的方案中,Q球主要衰变为核子,部分衰变为轴子,以同时解释宇宙的重子不对称性和暗物质。Q球在大爆炸核合成之前就衰变了,所以它不受衰变的影响。最小超对称标准模型衰变为超对称粒子在运动学上是被禁止的,直到衰变的最后,我们可以安全地使它们的丰度足够小,以成功地进行大爆炸核合成。我们展示了实现这种情况的axino模型参数和Q球参数的区域。

英文摘要:

We investigate the Q-ball decay into the axino dark matter in the gauge-mediated supersymmetry breaking. In our scenario, the Q ball decays mainly into nucleons and partially into axinos to account for the baryon asymmetry and the dark matter of the universe simultaneously. The Q ball decays well before the big bang nucleosynthesis so that it is not affected by the decay. The decay into the supersymmetric particles of the minimal supersymmetric standard model is kinematically prohibited until the very end of the decay, and we could safely make their abundances small enough for the successful big bang nucleosynthesis. We show the regions of axino model parameters and the Q-ball parameters which realize this scenario.

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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