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arXiv 1601.02140hep-phastro-ph.CO
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重Polonyi场的宇宙学

Cosmology with a Heavy Polonyi Field

Keisuke Harigaya, Taku Hayakawa, Masahiro Kawasaki, Masaki Yamada

摘要:

我们考虑一个宇宙学上一致的情况下,一个沉重的Polonyi场。质量为${\cal O}(100){\rm\,TeV}$的Polonyi场在大爆炸核合成(BBN)之前衰变,避免了BBN的严格约束。然而,衰变产生的锂离子超对称粒子(LSP)的丰度往往超过观测到的暗物质密度。在我们的方案中,暗物质密度是由LSP丰度和熵产生的帮助下,和重子不对称性产生的阿弗莱克-戴恩机制。我们发现,所观察到的重子暗物质比的${\cal O}(0.1\mathchar`-1)$自然解释隔离模型与QCD轴子。

英文摘要:

We consider a cosmologically consistent scenario with a heavy Polonyi field. The Polonyi field with a mass of ${\cal O}(100){\rm\,TeV}$ decays before the Big-Bang Nucleosynthesis (BBN) and avoids the severe constraint from the BBN. However, the abundance of the Lightest Supersymmetric Particle (LSP) produced from the decay often exceeds the observed dark matter density. In our scenario, the dark matter density is obtained by the LSP abundance with an aid of entropy production, and baryon asymmetry is generated by the Affleck-Dine mechanism. We show that the observed baryon-to-dark matter ratio of ${\cal O}(0.1\mathchar`-1)$ is naturally explained in sequestering models with a QCD axion.

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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