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arXiv 1212.4166hep-phhep-ex
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伪造$B_s \to μ^+μ^-$

Faking $B_s \to μ^+μ^-$

Y. G. Aditya, K. J. Healey, Alexey A. Petrov

摘要:

最近通过LHCb合作观测到的改变味道的中性电流衰减B_s到mu+ mu^-的证据B(B_s到mu^+ mu^-)=(3.2 * 10^{-9})与最新的标准模型预测B(B_s到mu^+ mu^-)=(3.23 +- 0.27)* 10^{-9}一致。虽然新物理学仍然可以影响这种衰变幅度,但它的贡献肯定不是主要的。我们分析了衰变B_s到μ + μ- X的分支比,其中X =光子或中微子反中微子对,它可以模拟B_s到μ + μ-的参数空间中X是软的部分。我们用模型无关的标准模型计算了这些包含重夸克和QCD的手征对称性的过程。我们表明,所考虑的贡献有助于B_s的μ + μ-在一个子百分比的水平。

英文摘要:

Recent evidence from observation of the flavor-changing neutral current decay B_s to mu+ mu- by the LHCb collaboration B(B_s to mu^+ mu^-) = (3.2 * 10^{-9}), is consistent with the latest standard model prediction B(B_s to mu^+ mu^-) = (3.23 +- 0.27) * 10^{-9}. While New Physics can still affect this decay amplitude, its contribution is certainly not the dominant one. We analyze branching ratios of the decays B_s to mu+ mu- X, with X = a photon or neutrino anti-neutrino pair, which can mimic B_s to mu+ mu- on portions of the parameter space where X is soft. We perform a model-independent standard model calculation of those processes incorporating heavy quark and chiral symmetries of QCD. We show that the considered contributions contribute to B_s to mu+ mu- at a sub-percent level.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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