Bs,d → l+l- in the Standard Model with Reduced Theoretical Uncertainty
Bs,d → l+l- in the Standard Model with Reduced Theoretical Uncertainty
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DOI：
10.1103/physrevlett.112.101801
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发表时间：
2014-03-11
影响因子：
8.6
通讯作者：
Steinhauser, Matthias
中科院分区：
文献类型：
--
作者：
Bobeth, Christoph;Gorbahn, Martin;Steinhauser, Matthias
我们将联合收割机的新结果结合起来，对B-s，B-d -> l（+）l（-）的O（alpha（em））和O（alpha（2）（s））修正，并给出了标准模型中这些衰变的最新分支比预测。列入新的修正删除了主要的理论不确定性的微扰起源，刚刚开始占主导地位的参数。对于最近观察到的B-s介子的μ子衰变，我们的计算给出了B（B-s-> mu（+）mu（-））=（3.65 +/- 0.23）× 10（-9）.
We combine our new results for the O(alpha(em)) and O(alpha(2)(s)) corrections to B-s,B-d -> l(+)l(-), and present updated branching ratio predictions for these decays in the standard model. Inclusion of the new corrections removes major theoretical uncertainties of perturbative origin that have just begun to dominate over the parametric ones. For the recently observed muonic decay of the B-s meson, our calculation gives B(B-s -> mu(+)mu(-)) = (3.65 +/- 0.23) x 10(-9).