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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2004.10761hep-ph
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破镜双色

Breaking Mirror Twin Color

Brian Batell, Wei Hu, Christopher B. Verhaaren

摘要:

我们研究了镜像孪生希格斯模型的简单扩展,其中孪生色规范对称性和离散的$Z_2$镜像对称性自发破缺。这是通过引入一个新的有色三重态、六重态或八重态标量场及其孪生体以及一个合适的标量势来实现的。这种自发的$Z_2$破缺使得电弱真空在现象学上可行地对齐,并导致可见光和镜像扇区之间关于低能量下的剩余规范对称性、色限尺度和粒子光谱的显著差异。特别是,我们的几个模型具有残余$SU(2)$或$SO(3)$双色规范对称性,与$Λ_{\rm QCD}$相比具有非常低的限制尺度。此外,色标量和物质之间的耦合提供了孪生费米子质量的新动力学来源,并且由于镜像对称性,这些导致了各种相关的可见扇区效应,可以通过精确测量和对撞机搜索来探测。

英文摘要:

We investigate simple extensions of the Mirror Twin Higgs model in which the twin color gauge symmetry and the discrete $Z_2$ mirror symmetry are spontaneously broken. This is accomplished in a minimal way by introducing a single new colored triplet, sextet, or octet scalar field and its twin along with a suitable scalar potential. This spontaneous $Z_2$ breaking allows for a phenomenologically viable alignment of the electroweak vacuum, and leads to dramatic differences between the visible and mirror sectors with regard to the residual gauge symmetries at low energies, color confinement scales, and particle spectra. In particular, several of our models feature a remnant $SU(2)$ or $SO(3)$ twin color gauge symmetry with a very low confinement scale in comparison to $Λ_{\rm QCD}$. Furthermore, couplings between the colored scalar and matter provide a new dynamical source of twin fermion masses, and due to the mirror symmetry, these lead to a variety of correlated visible sector effects that can be probed through precision measurements and collider searches.

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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