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arXiv 1909.01604hep-ph
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轴子畴壁问题的动力学解

A Dynamical Solution to the Axion Domain Wall Problem

Masahiro Ibe, Shin Kobayashi, Motoo Suzuki, Tsutomu T. Yanagida

摘要:

畴壁问题和等曲率问题限制了轴子模型和膨胀模型的可能组合。本文考虑了一种新的机制,通过暴胀期间/之后多个标量场的动力学来解决这些问题。该机制使得具有非平凡畴壁数的轴子模型与具有大哈勃参数$H_{I} \gg 10^{7\mbox{-}8}\,$ GeV的膨胀模型兼容。该机构还避免了等曲率问题。这种机制增加了选择轴子模型和暴胀模型组合的自由度。

英文摘要:

The domain wall problem and the isocurvature problem restrict possible combinations of axion models and inflation models. In this paper, we considered a new mechanism which solves those problems by dynamics of multiple scalar fields during/after inflation. The mechanism makes axion models with a non-trivial domain wall number compatible with inflation models with a large Hubble parameter, $H_{I} \gg 10^{7\mbox{-}8}\,$GeV. The mechanism also avoids the isocurvature problem. This mechanism increases the freedom of choice of combinations of axion models and inflation models.

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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