Lessons from the $B^{0,+}\to K^{*0,+}\mu^+\mu^-$ angular analyses

Understand

We perform an analysis within the Standard Model of $B^{0,+} \to K^{*0,+} \mu^+ \mu^-$ decays in light of the recent measurements from the LHCb experiment, showing that new data strengthen the need for sizable hadronic contributions and correlations among them.

• We then extend our analysis to New Physics via the Standard Model Effective Theory, and carry out a state-of-the-art fit of available $b \to s \ell^+ \ell^-$ data, including possible hadronic contributions.
• We find the case of a fully left-handed operator standing out as the simplest scenario with a significance of almost $6\sigma$.