Vector leptoquark mass limits and branching ratios of KL0,B0,Bs → li+lj− decays with account of fermion mixing in leptoquark currents
Vector leptoquark mass limits and branching ratios of KL0,B0,Bs → li+lj− decays with account of fermion mixing in leptoquark currents
复制标题
矢量轻夸克质量极限和 KL0,B0,Bs → li+lj− 的分支比随着轻夸克电流中费米子混合的衰减而衰减
DOI：
10.1142/s0217732318500190
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发表时间：
2018
影响因子：
1.4
通讯作者：
A. D. Smirnov
中科院分区：
文献类型：
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作者：
A. D. Smirnov
考虑到一般型轻夸克流中的费米子混合，计算了Pati-Salam型矢量轻夸克对KL 0，B 0，B s → ll′衰变分支比的贡献.利用混合矩阵的一般参数化，从这些衰变的现有实验数据中找到了矢量轻夸克质量下限mV > 86 TeV。计算了在mV = 86 TeV时B 0，B s → ll′衰变的分支比.衰变B 0、B s → μ+μ−、eμ的分支比接近实验数据，而衰变B 0 → e+e−、eτ、μτ和Bs → e+e−的分支比比它们目前的实验极限小2-4个数量级。对于衰变Bs → eτ，μτ，这些分支比分别为10 - 10和10 - 9数量级。预测的分支比将是有用的，在当前和未来的实验搜索这些衰变。
The contributions of the vector leptoquarks of Pati–Salam type to the branching ratios of KL0,B0,B s → ll′ decays are calculated with account of the fermion mixing in the leptoquark currents of the general type. Using the general parametrizations of the mixing matrices the lower vector leptoquark mass limit mV > 86 TeV is found from the current experimental data on these decays. The branching ratios of the decays B0,B s → ll′ predicted at mV = 86 TeV are calculated. These branching ratios for the decays B0,B s → μ+μ−,eμ are close to the experimental data whereas those for the decays B0 → e+e−,eτ,μτ and Bs → e+e− are by order of 2–4 less than their current experimental limits. For the decays Bs → eτ,μτ these branching ratios are of orders 10−10 and 10−9, respectively. The predicted branching ratios will be useful in the current and future experimental searches for these decays.