Abstract
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 $6\sigma$.
Highlights
We perform an analysis within the Standard Model of B0;þ → KÃ0;þμþμ− 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 extend our analysis to new physics via the Standard Model effective theory, and carry out a state-of-the-art fit of available b → slþl− data, including possible hadronic contributions
As any other indirect search for new physics (NP), the quest for NP in b → slþl− decays requires high experimental precision, and a robust estimate of theoretical uncertainties in the Standard Model (SM) prediction. From this point of view, the set of experimental results which hint at NP in b → slþl− transitions can be divided in two broad classes
Summary
We perform an analysis within the Standard Model of B0;þ → KÃ0;þμþμ− 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 extend our analysis to new physics via the Standard Model effective theory, and carry out a state-of-the-art fit of available b → slþl− data, including possible hadronic contributions.
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