Emerging patterns of New Physics with and without Lepton Flavour Universal contributions

International audienceWe perform a model-independent global fit to $b\rightarrow s\ell ^+\ell ^-$ observables to confirm existing New Physics (NP) patterns (or scenarios) and to identify new ones emerging from the inclusion of the updated LHCb and Belle measurements of $R_K$ and $R_{K^*}$ , respectively. Our analysis, updating Refs. Capdevila et al. (J Virto JHEP 1801:093, 2018) and Algueró et al. (J Matias Phys Rev D 99(7):075017, 2019) and including these new data, suggests the presence of right-handed couplings encoded in the Wilson coefficients ${{{\mathcal {C}}}}_{9'\mu }$ and ${{{\mathcal {C}}}}_{10'\mu }$ . It also strengthens our earlier observation that a lepton flavour universality violating (LFUV) left-handed lepton coupling ( ${{{\mathcal {C}}}}_{9\mu }^{\mathrm{V}}=-\,{{{\mathcal {C}}}}_{10\mu }^{\mathrm{V}}$ ), often preferred from the model building point of view, accommodates the data better if lepton-flavour universal (LFU) NP is allowed, in particular in ${{{\mathcal {C}}}}_{9}^{\mathrm{U}}$ . Furthermore, this scenario with LFU NP provides a simple and model-independent connection to the $b\rightarrow c\tau \nu $ anomalies, showing a preference of $\approx 7\,\sigma $ with respect to the SM. It may also explain why fits to the whole set of $b\rightarrow s\ell ^+\ell ^-$ data or to the subset of LFUV data exhibit stronger preferences for different NP scenarios. Finally, motivated by $Z^\prime $ models with vector-like quarks, we propose four new scenarios with LFU and LFUV NP contributions that give a very good fit to data