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arXiv 0705.0079hep-ph
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重模场景中的重子不对称性

Baryon Asymmetry in a Heavy Moduli Scenario

Masahiro Kawasaki, Kazunori Nakayama

摘要:

在某些超对称性破缺的模型中,模场的强度足以在BBN之前衰变。但是,通过模量衰变产生的大熵大大稀释了宇宙中先前存在的重子不对称性。我们研究了Affleck-Dine机制是否能提供足够的重子不对称性,并发现了几种情况下,在稀释后的重子数保持理想的数量。本文还讨论了非热暗物质存在的可能性。这提供了具有重模量的现实宇宙学场景。

英文摘要:

In some models of supersymmetry breaking, modulus fields are heavy enough to decay before BBN. But the large entropy produced via moduli decay significantly dilutes the preexisting baryon asymmetry of the universe. We study whether Affleck-Dine mechanism can provide enough baryon asymmetry which survives the dilution, and find several situations in which desirable amount of baryon number remains after the dilution. The possibility of non-thermal dark matter is also discussed. This provides the realistic cosmological scenario with heavy moduli.

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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