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arXiv 1803.04430hep-ph
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矢量类中微子暗物质和$R_{K^{(*)}}$的有趣的$Z'$门户

Flavourful $Z'$ portal for vector-like neutrino Dark Matter and $R_{K^{(*)}}$

Adam Falkowski, Stephen F. King, Elena Perdomo, Mathias Pierre

摘要:

我们讨论了一个与第四族单重态狄拉克中微子暗物质耦合的$Z'$门模型。在没有混合的情况下,$Z'$是疏费米的,与三个手性家族没有耦合,但与第四个矢量样家族耦合。由于混合效应,$Z'$与第二族左手轻子二重态和第三族左手夸克二重态产生诱导耦合。这个模型可以同时解释测量到的$B$ -衰变比$R_{K}$和$R_{K^*}$以及观测到的暗物质遗迹丰度。我们确定的参数空间,这种解释是符合现有的实验限制,从暗物质直接和间接检测,大型强子对撞机的搜索,和精确测量的味道混合和中微子过程。

英文摘要:

We discuss a flavourful $Z'$ portal model with a coupling to fourth-family singlet Dirac neutrino dark matter. In the absence of mixing, the $Z'$ is fermiophobic, having no couplings to the three chiral families, but does couple to a fourth vector-like family. Due to mixing effects, the $Z'$ gets induced couplings to second family left-handed lepton doublets and third family left-handed quark doublets. This model can simultaneously account for the measured $B$-decay ratios $R_{K}$ and $R_{K^*}$ and for the observed relic abundance of dark matter. We identify the parameter space where this explanation is consistent with existing experimental constraints from dark matter direct and indirect detection, LHC searches, and precision measurements of flavour mixing and neutrino processes.

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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