Explanation of B -> K((*))l(+)l(-) and muon g-2, and implications at the LHC
Explanation of B -> K((*))l(+)l(-) and muon g-2, and implications at the LHC
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B -> K((*))l( )l(-) 和 muon g-2 的解释，以及对大型强子对撞机的影响
DOI：
10.1103/physrevd.94.115005
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发表时间：
2016
影响因子：
5
通讯作者：
H. Okada
中科院分区：
文献类型：
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作者：
C. Chen;Takaaki Nomura;H. Okada
在$B\to K^* \mu^+ \mu^-$和μ子$g-2$的角度可观测到的$P'_5$中，与标准模型的偏差超过$3\sigma$。为了解决这些异常，我们通过添加两个轻夸克扩展了标准模型。发现双光子希格斯衰变的信号强度可以表现出明显的单位偏差，并在数据误差范围内。虽然$\ell_i \to \ell_j \gamma$对某些耦合设置了严格的界限，但发现$P'_5$和μ子$g-2$的过度仍然可以解释，并且可以适应该模型中$B_s\to \mu^+ \mu^-$的测量。此外，轻夸克效应也可以解释$R_K = BR(B^+ \to K^+ \mu^+\mu^-)/BR(B^+ \to K^+ e^+e^-)=0.745^{+0.090}_{-0.074} \pm 0.036$的LHCb测量，它显示出与标准模型预测的$2.6\sigma$偏差。
More than $3\sigma$ deviations from the standard model are observed in the angular observable $P'_5$ of $B\to K^* \mu^+ \mu^-$ and muon $g-2$. To resolve these anomalies, we extend the standard model by adding two leptoquarks. It is found that the signal strength of the diphoton Higgs decay can exhibit a significant deviation from unity and is within the data errors. Although $\ell_i \to \ell_j \gamma$ puts severe bounds on some couplings, it is found that the excesses of $P'_5$ and muon $g-2$ can still be explained and can be accommodated to the measurement of $B_s\to \mu^+ \mu^-$ in this model. In addition, the leptoquark effects can also explain the LHCb measurement of $R_K = BR(B^+ \to K^+ \mu^+\mu^-)/BR(B^+ \to K^+ e^+e^-)=0.745^{+0.090}_{-0.074} \pm 0.036$, which shows a $2.6\sigma$ deviation from the standard model prediction.