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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2008.09793hep-phhep-ex
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由$(B-L)_{23}$玻色子诱导的$(g-2)_μ$与$K \to π+E_{miss}$

$(g-2)_μ$ Versus $K \to π+E_{miss}$ Induced by the $(B-L)_{23}$ Boson

Zhaofeng Kang, Yoshihiro Shigekami

摘要:

为了通过轻玻色子解决长期存在的$(g-2)_μ$异常,在参考文献[1]中,我们提出用局域$(B-L)_{23}$扩展标准模型(SM),在局域$(B-L)_{23}$下,只有第二代和第三代费米子带电。它预言了一个不可见的质量为${\cal O}(100)$ MeV的$Z'$,而且它在树水平上与上型夸克有变味中性流(FCNC)耦合。这种$Z'$通过循环级的$K_L \to π^0 + Z'(\to ν\barν)$可能是解释最近KOTO异常的自然候选。在本文中,我们调查了这种可能性,发现如果$Z'$不再对$(g-2)_μ$异常负责,它可以很容易地完成这项工作。我们进一步发现,这两个异常可以用CP破坏的适度调谐来解释,但可能与$B$介子衰变相矛盾。

英文摘要:

To address the long-standing $(g-2)_μ$ anomaly via a light boson, in Ref. [1] we proposed to extend the standard model (SM) by the local $(B-L)_{23}$, under which only the second and third generations of fermions are charged. It predicts an invisible $Z'$ with mass ${\cal O}(100)$ MeV, and moreover it has flavor-changing neutral current (FCNC) couplings to the up-type quarks at tree level. Such a $Z'$, via $K_L \to π^0 + Z'(\to ν\barν)$ at loop level, may be a natural candidate to account for the recent KOTO anomaly. In this article, we investigate this possibility, to find that $Z'$ can readily do this job if it is no longer responsible for the $(g-2)_μ$ anomaly. We further find that both anomalies can be explained with moderate tuning of the CP violation, but may contradict the $B$ meson decays.

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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