Electroweak phase transition triggered by fermion sector
Electroweak phase transition triggered by fermion sector
复制标题
费米子扇区引发的电弱相变
DOI：
10.1007/jhep01(2022)001
复制
发表时间：
2022
影响因子：
5.4
通讯作者：
Jiang-Hao Yu
中科院分区：
文献类型：
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作者：
Qing-Hong Cao;Katsuya Hashino;Xu-Xiang Li;Zhe Ren;Jiang-Hao Yu
抽象的。为了实现一级电弱相变，需要在热Higgs势中产生一个势垒，而这个势垒通常是由标量自由度触发的。相反，我们研究相变模式在纯费米子扩展的标准模型，并发现，额外的费米子质量层次和混合可以开发这样的障碍，并实现一个强烈的一阶相变在这样的模型。在多项式参数化的希格斯势中，由于费米子约化效应，势垒可以以以下两种方式产生：（I）正二次项、负三次项和正四次项或（II）正二次项、负四次项和正高维项，例如6维算子。
Abstract. 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 a barrier and realize a 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 by fermionic reduction effects: (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.