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arXiv 1908.00019hep-phastro-ph.COhep-th
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非高斯条件下标准模型的最小特征

Minimal signatures of the Standard Model in non-Gaussianities

Anson Hook, Junwu Huang, Davide Racco

摘要:

我们发现,一个移位对称暴胀子和标准模型费米子之间的主导耦合导致了一个诱导的电弱对称性破缺,由于在暴胀过程中的粒子生产,因此,一个独特的非高斯振荡功能。在这个单参数模型中,标准模型费米子的增强产生动态地产生一个新的电弱对称性破缺最小值,希格斯场经典地滚入其中。费米子的产生在希格斯期望值和费米子质量变得太大时停止,从而抑制了费米子的产生。上述效应之间的平衡给出了标准模型费米子的质量,这些质量是由它们与暴胀子的耦合唯一确定的。特别是,最重的标准模型费米子,顶夸克,可以产生一个独特的宇宙对撞机物理特征,其特征是振荡信号的振幅和频率之间的一对一关系,这是在未来的21厘米调查观察。

英文摘要:

We show that the leading coupling between a shift symmetric inflaton and the Standard Model fermions leads to an induced electroweak symmetry breaking due to particle production during inflation, and as a result, a unique oscillating feature in non-Gaussianities. In this one parameter model, the enhanced production of Standard Model fermions dynamically generates a new electroweak symmetry breaking minimum, where the Higgs field classically rolls into. The production of fermions stops when the Higgs expectation value and hence the fermion masses become too large, suppressing fermion production. The balance between the above-mentioned effects gives the Standard Model fermions masses that are uniquely determined by their couplings to the inflaton. In particular, the heaviest Standard Model fermion, the top quark, can produce a distinct cosmological collider physics signature characterised by a one-to-one relation between amplitude and frequency of the oscillating signal, which is observable at future 21-cm surveys.

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