论文标题
$ b_s \toγγ，γ\ ell \ bar {\ ell} $衰减中的奇怪夸克质量效应
Strange quark mass effect in $B_s \to γγ,γ\ell\bar{\ell}$ decays
论文作者
论文摘要
在本文中，我们调查了$ b_s \toγγ$的临时功率贡献，以及$ b_s \toγ\ ell \ bar {\ ell} $从奇怪的夸克质量效应中衰减，并具有QCD的分散方法，即QCD启发和更具预测性。我们已经介绍了$ b_s \toγγ$和$ b_s \toγ\ ell \ bar {\ ell} $衰减中夸克质量贡献的分析表达，以及在先前研究中遗漏的新术语。奇怪的夸克质量对$ b_s \至γγ$衰减的数值结果相对于总的分支比率约为6％，而在$ b_s \toγ\ ell \ ell \ ell \ bar {\ ell} $衰减中，它相对较小
In this paper we investigate the next-to-leading power contribution to the $B_s \to γγ$ and $B_s \to γ\ell\bar{\ell}$ decays from the strange quark mass effect with the dispersion approach which is QCD inspired and more predictive. We have presented the analytic expression of the quark mass contribution in the $B_s \to γγ$ and $B_s \to γ\ell\bar{\ell}$ decays, together with a new term that is missed in the previous study. The numerical results of the strange quark mass contribution to the $B_s \to γγ$ decay is about 6% relative to the total branching ratio, while it is relatively small in the $B_s \to γ\ell\bar{\ell}$ decay due to the large resonance contribuiton
