Flavor anomalies on the eve of the Run-2 verdict
Flavor anomalies on the eve of the Run-2 verdict
复制标题
Run-2 判决前夕的风味异常
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
D. Guadagnoli
中科院分区：
文献类型：
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作者：
D. Guadagnoli
LHC B的RK测量表明非标准轻子普适性破坏（LUV）发生在B → sl+l−衰变中，其影响在μ子而不是电子中。令人感兴趣的是，LHC B和B工厂对B → sl+l−跃迁的许多其他测量在幅度和符号上与RK效应一致，并且符合相干的有效理论图像。非标准LUV的进一步指示是通过比率R（D）和R（D τ）在B → cτν跃迁中的长期差异提供的。我们详细回顾了实验情况和丰富的前景，理论上的努力-和他们的挑战-令人信服的动力学超越有效的理论水平，并讨论了许多方向的进一步调查，从目前的情况下传播。
The RK measurement by LHCb suggests nonstandard Lepton-Universality Violation (LUV) to occur in b → sl+l− decays with effects in muons rather than electrons. It is intriguing that a number of other measurements of b → sl+l− transitions by LHCb and B-factories are consistent in magnitude and sign with the RK effect, and fit a coherent effective-theory picture. Further indications of nonstandard LUV are provided by the long-standing discrepancies in b → cτν transitions via the ratios R(D) and R(D∗). We review in detail the experimental situation and its rich outlook, the theoretical efforts — and their challenges — towards convincing dynamics beyond the effective-theory level, and discuss the many directions of further investigation that propagate from the current situation.