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arXiv 2108.11295hep-phastro-ph.CO
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通过暗轴子入口的宇宙学弛豫

Cosmological Relaxation through the Dark Axion Portal

Valerie Domcke, Kai Schmitz, Tevong You

摘要:

暗轴子入口是类轴子粒子与暗光子的耦合,暗光子与可见光子动力学混合。我们展示了这个门户网站,当应用到松弛,可以导致宇宙学松弛的弱尺度使用暗光子生产。关键的逆反应机制涉及施温格效应:只要电弱对称性未被破坏,携带暗毫电荷的无质量标准模型费米子的施温格产生会抑制暗光子的产生。一旦电弱对称性被打破,费米子获得质量,抑制被解除。一个增强的暗光子耗散,然后陷阱的弛豫在一个自然的小弱标度。因此,我们的模型提供了一个新的联系之间的现象学暗轴子门户,暗光子,希格斯质量的层次问题。

英文摘要:

The dark axion portal is a coupling of an axion-like particle to a dark photon kinetically mixed with the visible photon. We show how this portal, when applied to the relaxion, can lead to cosmological relaxation of the weak scale using dark photon production. The key backreaction mechanism involves the Schwinger effect: As long as electroweak symmetry is unbroken, Schwinger production of massless Standard Model fermions, which carry dark millicharges, suppresses the dark photon production. Once the electroweak symmetry is broken, the fermions acquire mass and the suppression is lifted. An enhanced dark photon dissipation then traps the relaxion at a naturally small weak scale. Our model thus provides a novel link between the phenomenological dark axion portal, dark photons, and the hierarchy problem of the Higgs mass.

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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