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arXiv 2007.10875hep-ph
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一个具有重复合轴子的复合希格斯粒子

A Composite Higgs with a Heavy Composite Axion

Tony Gherghetta, Minh D. Nguyen

摘要:

我们认为强动力学与复合希格斯模型,同时产生动力学轴子,解决了强CP问题。强动力学来自于一个新的$Sp$或$SU(4)$超色规范群,其中包含限制在高尺度的QCD色超费米子。超色整体对称性由标准模型电弱规范群和扩大的色群$SU(N+3) \times SU(N)'$弱规范。当超费米子凝聚形成时,它们不仅导致$SU(5)/SO(5)$复合Higgs模型,而且自发地将扩大的色群破缺为$SU(3)_c \times SU(N)_D$。在较低的能量下,$SU(N)_D$群受到限制,产生两个动力学轴子,消除了所有的CP破坏。此外,来自$SU(N)'$组的小瞬子可以增强轴子质量,从而产生TeV尺度的轴子质量,可以在对撞机实验中检测到。我们的模型提供了一种方法来统一的复合希格斯粒子与动力学轴子,而不引入新的基本标量场,同时也扩展了解决强CP问题的轴子质量的范围。

英文摘要:

We consider the strong dynamics associated with a composite Higgs model that simultaneously produces dynamical axions and solves the strong CP problem. The strong dynamics arises from a new $Sp$ or $SU(4)$ hypercolor gauge group containing QCD colored hyperfermions that confines at a high scale. The hypercolor global symmetry is weakly gauged by the Standard Model electroweak gauge group and an enlarged color group, $SU(N+3) \times SU(N)'$. When hyperfermion condensates form, they not only lead to an $SU(5)/SO(5)$ composite Higgs model but also spontaneously break the enlarged color group to $SU(3)_c \times SU(N)_D$. At lower energies, the $SU(N)_D$ group confines, producing two dynamical axions that eliminates all CP violation. Furthermore, small instantons from the $SU(N)'$ group can enhance the axion mass, giving rise to TeV scale axion masses that can be detected at collider experiments. Our model provides a way to unify the composite Higgs with dynamical axions, without introducing new elementary scalar fields, while also extending the range of axion masses that addresses the strong CP problem.

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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