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arXiv 1012.4558astro-ph.COhep-ph
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弦壁网络的演化与轴对称畴壁问题

Evolution of String-Wall Networks and Axionic Domain Wall Problem

Takashi Hiramatsu, Masahiro Kawasaki, Ken'ichi Saikawa

摘要:

我们研究了在轴子模型中自然产生的由弦束缚的畴壁的宇宙学演化。如果我们在势中引入一个偏置,壁就会变成亚稳态,最后消失。我们进行二维晶格模拟的畴壁网络和估计畴壁的衰减率。利用数值结果,我们给出了一个约束的偏差参数和Peccei-Quinn尺度。我们还讨论了通过直接探测畴壁产生的引力波来探测轴子模型的可能性。

英文摘要:

We study the cosmological evolution of domain walls bounded by strings which arise naturally in axion models. If we introduce a bias in the potential, walls become metastable and finally disappear. We perform two dimensional lattice simulations of domain wall networks and estimate the decay rate of domain walls. By using the numerical results, we give a constraint for the bias parameter and the Peccei-Quinn scale. We also discuss the possibility to probe axion models by direct detection of gravitational waves produced by domain walls.

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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