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arXiv 2103.05688hep-ph
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由费米子扇区触发的电弱相变

Electroweak phase transition triggered by fermion sector

Qing-Hong Cao, Katsuya Hashino, Xu-Xiang Li, Zhe Ren, Jiang-Hao Yu

摘要:

要实现一级电弱相变,需要在热Higgs势中产生势垒,而势垒通常由标量自由度触发。相反,我们研究的相变模式在纯费米子扩展的标准模型,并发现额外的费米子与质量层次和混合可以开发这样的障碍,并实现强烈的一级相变在这样的模型。在多项式参数化的Higgs势中,势垒可以以两种形式产生:(1)正二次项、负三次项和正四次项;(2)正二次项、负四次项和正高维项,如6维算符。

英文摘要:

To realize first-order electroweak phase transition, it is necessary to generate a barrier in the thermal Higgs potential, which is usually triggered by scalar degree of freedom. We instead investigate phase transition patterns in pure fermion extensions of the standard model, and find that additional fermions with mass hierarchy and mixing could develop such barrier and realize strongly first-order phase transition in such models. In the Higgs potential with polynomial parametrization, the barrier can be generated in the following two patterns: (I) positive quadratic term, negative cubic term and positive quartic term or (II) positive quadratic term, negative quartic term and positive higher dimensional term, such as dimensional 6 operator.

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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