论文标题
长距离对$ b \ to k^{（\ ast）} \ ell^+ \ ell^ - $在标准模型中的作用
The role of long distance contribution to the $B\to K^{(\ast)} \ell^+ \ell^-$ in the Standard Model
论文作者
论文摘要
我们通过查看长距离贡献来研究稀有的半乳房$ b \ ast \ ell^+\ ell^ - $。我们的分析仅限于Leptonic夫妇$ Q^2 $的物理可访问范围非常小的值。我们表明，必须将光夸克循环与迷人的企鹅贡献一起考虑，以便在标准模型中准确计算$ q^2 $ -Spectrum。在此过程中，如此长的距离贡献也可能在对Lepton风味普遍性的分析中发挥作用。
We investigate rare semileptonic $B \to K^\ast\ell^+\ell^-$ by looking at the long distance contributions. Our analysis is limited to the very small values of physical accessible range of invariant mass of the leptonic couple $q^2$. We show that the light quarks loop has to be accounted for, along with the charming penguin contribution, in order to accurately compute the $q^2$-spectrum in the Standard Model. Such a long distance contribution may also play a role in the analysis of the lepton flavour universality violation in this process.
