| Abstract 摘要 | Anomalies in (semi)leptonic B-meson decays present interesting patterns that might be revealing the shape of the new physics to come. I will
review the decays and observables where these appear, discussing the extent up to which the respective SM predictions are understood. In this sense, the most interesting anomaly is the violation of lepton universality suggested by a recent measurement of a deficit of $B^+\to K^+\mu\mu$ over $B^+\to K^+ee$ decays or of B->D(*)tau nu over B->D(*)l nu. This raises very interesting questions concerning the lepton-flavor structure of the presumed new interactions, some of which I will address in the context of effective operators. Finally, I will discuss new possible experiments that could unambiguously confirm and characterize the putative new-physics effect. |
