论文标题
将$ h \与μ^+μ^ - $相关联，$ $ $与Muon的异常磁矩通过leptoquarks
Correlating $h\toμ^+μ^-$ to the Anomalous Magnetic Moment of the Muon via Leptoquarks
论文作者
论文摘要
最近，Atlas和CMS都测量了衰减$ h \toμ^+μ^ - $，相对于标准模型期望为$ 1.2 \ pm0.6 $和$ 1.19 \ ordack {+0.41+0.41+0.41+0.17 \\ - 0.39 -0.16} $。这首先提供了标准模型希格斯与第二代费米子的伴侣的证据。在近年来积累的Lepton风味普遍性的有趣提示的背景下，这种测量特别有趣，因为新物理学解释也可以在$ H \toμ^{+}μ^{ - } $衰减模式中进行测试。 Leptoquarks是考虑风味异常的主要候选人。特别是，他们可以提供必要的手性增强功能（通过$ m_t/m_μ$），以使用TEV秤新物理学来解决$a_μ$。在这封信中，我们指出的是，$a_μ$的这种解释也导致$ h \toμ^+μ^ - $增强效果，我们检查了leptoquark模型中$ h \toμ^+μ^ - $和$a_μ$之间的相关性。我们发现，如果一个人以$ 2 \ $ 2 \σ$级别的价格计算$ h \^+μ^ - $范围为$ h \^+μ^ - $范围为$ h \^+μ^ - $范围的效果。因此，新的Atlas和CMS测量已经对参数空间提供了重要的限制，排除了特定的$A_μ$说明，并且对未来测试风味异常非常重要。
Recently, both ATLAS and CMS measured the decay $h\toμ^+μ^-$, finding a signal strength with respect to the Standard Model expectation of $1.2\pm0.6$ and $1.19\substack{+0.41+0.17\\-0.39 -0.16}$, respectively. This provides, for the first time, evidence that the Standard Model Higgs couples to second generation fermions. This measurement is particularly interesting in the context of the intriguing hints for lepton flavor universality violation, accumulated within recent years, as new physics explanations could also be tested in the $h\toμ^{+}μ^{-}$ decay mode. Leptoquarks are prime candidates to account for the flavor anomalies. In particular, they can provide the necessary chiral enhancement (by a factor $m_t/m_μ$) to address $a_μ$ with TeV scale new physics. In this letter we point out that such explanations of $a_μ$ also lead to enhanced effects in $h\toμ^+μ^-$ and we examine the correlations between $h\toμ^+μ^-$ and $a_μ$ within leptoquark models. We find that the effect in the branching ratio of $h\toμ^+μ^-$ ranges from several percent up to a factor three, if one aims at accounting for $a_μ$ at the $2\,σ$ level. Hence, the new ATLAS and CMS measurements already provide important constraints on the parameter space, rule out specific $a_μ$ explanations and will be very important to test the flavor anomalies in the future.
