<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math> anomalies in the post-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>R</mml:mi><mml:msup><mml:mi>K</mml:mi><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>*</mml:mo><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:msup></mml:msub></mml:math> era

Abstract

We discuss the status of $b\ensuremath{\rightarrow}s{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$ decays in the post-${R}_{{K}^{(*)}}$ era. The recent LHCb update of ${R}_{K}$ and ${R}_{{K}^{*}}$ measurements, which are now compatible with the Standard Model, constrain new physics contributions to be lepton-flavor universal, allowing only small deviations from this limit. In addition to the latest LHCb measurements of ${R}_{K}$ and ${R}_{{K}^{*}}$, we also include the recent CMS measurements of ${R}_{K}$ and of the branching ratio of ${B}^{+}\ensuremath{\rightarrow}{K}^{+}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$. We present a model-independent analysis of the $b\ensuremath{\rightarrow}s{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$ data and investigate the implications of the different sets of observables. In addition, we consider multidimensional fits and discuss the significance of more complex new physics scenarios compared to one- and two-dimensional scenarios.

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