arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1712.05366hep-ph
收藏

SO(10)类矢量大统一理论的非普适Z'和中微子质量的起源

Non-universal Z' from SO(10) GUTs with vector-like family and the origin of neutrino masses

Stefan Antusch, Christian Hohl, Steve F. King, Vasja Susic

摘要:

质量在(几个)TeV尺度的$Z'$规范玻色子是超越标准模型(SM)的物理学的一个流行例子,也是大统一理论(GUT)的一个迷人的遗迹。最近,$Z'$模型与非通用耦合的SM费米子由于额外的矢量状态已受到关注,作为潜在的解释目前的$R_K$,$R_{K^{\ast}}$异常;这包括大统一组织模型的建议的基础上$\mathrm{SO}(10)$组。在本文中,我们进一步发展了大统一模型与风味非普遍的低尺度$Z'$,并澄清其中几个突出的问题。首先,我们成功地将一个现实的中微子部门(线性和/或逆低尺度跷跷板机制),这是迄今为止缺少的成分。其次,我们详细研究了它们与$R_K$,$R_{K^{\ast}}$异常的兼容性,我们发现这些异常在这样的模型中没有一致的解释。第三,我们证明了这些模型有其他引人注目的现象学特征;我们研究了味道违反过程之间的相关性的$μ\to 3e$和$μ$ - $e$转换的μ子原子,显示了如何在实验中表现出一个大胃肠道印记。

英文摘要:

A $Z'$ gauge boson with mass around the (few) TeV scale is a popular example of physics beyond the Standard Model (SM) and can be a fascinating remnant of a Grand Unified Theory (GUT). Recently, $Z'$ models with non-universal couplings to the SM fermions due to extra vector-like states have received attention as potential explanations of the present $R_K$, $R_{K^{\ast}}$ anomalies; this includes GUT model proposals based on the $\mathrm{SO}(10)$ group. In this paper we further develop GUT models with a flavour non-universal low scale $Z'$ and clarify several outstanding issues within them. First, we successfully incorporate a realistic neutrino sector (with linear and/or inverse low scale seesaw mechanism), which was so far a missing ingredient. Second, we investigate in detail their compatibility with the $R_K$, $R_{K^{\ast}}$ anomalies; we find that the anomalies do not have a consistent explanation within such models. Third, we demonstrate that these models have other compelling phenomenological features; we study the correlations between the flavour violating processes of $μ\to 3e$ and $μ$-$e$ conversion in a muonic atom, showing how a GUT imprint could manifest itself in experiments.

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。

↑