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Résumé |
Current B-physics data contain two intriguing tensions. First,
the LHCb collaboration has reported on some anomalies in b-s
transitions, with discrepancies with the Standard Model predictions in
some angular observables and branching ratios and intriguing hints for
lepton universality violation. And second, BaBar, Belle and LHCb have
found compatible deviations in observables associated to b-c
transitions, again hinting at the violation of lepton universality. We
will review the proposed explanations for these tensions and focus on
new physics models that can simultaneously
address both anomalies. In particular, we will discuss gauge extensions
of the Standard Model aiming at such goal.
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