B-anomalies related to leptons and lepton flavour universality violation

Abstract

Several experiments observed deviations from the Standard Model (SM) in the flavour sector: LHCb found a $4-5\sigma$ discrepancy compared to the SM in $b\to s{\mu }^{+}{\mu }^{-}$ transitions (recently supported by an Belle analysis) and CMS reported a non-zero measurement of $h\to \mu \tau$ with a significance of $2.4\sigma$. Furthermore, BELLE, BABAR and LHCb founds hints for the violation of flavour universality in $B\to D^{(\ast )}\tau \nu$. In addition, there is the long-standing discrepancy in the anomalous magnetic moment of the muon. Interestingly, all these anomalies are related to muons and taus, while the corresponding electron channels seem to be SM like. This suggests that these deviations from the SM might be correlated and we briefly review some selected models providing simultaneous explanations.

arXiv comment9 pages, 3 figures, no equations. Proceedings of BEAUTY 2016: 16th International Conference on B-Physics at Frontier Machines, Marseille, France. Extended version of arXiv:1605.02934

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Cited by in corpus (2)

• Simultaneous Explanation of $R(D^{(\ast )})$ and $b\to s{\mu }^{+}{\mu }^{-}$: The Last Scalar Leptoquarks Standing
• Lepton Flavor Non-Universality in B decays from Dynamical Yukawas