The → form factors from QCD and their impact on .

Unlabelled: We revisit light-cone sum rules with pion distribution amplitudes to determine the full set of local → form factors. To this end, we determine all duality threshold parameters from a Bayesian fit for the first time. Our results, obtained at small momentum transfer , are extrapolated to large where they agree with precise lattice QCD results.

Comprehensive Bayesian analysis of rare (semi)leptonic and radiative [Formula: see text] decays.

The available data on [Formula: see text] decays are in good agreement with the Standard Model when permitting subleading power corrections of about [Formula: see text] at large hadronic recoil. Constraining new-physics effects in [Formula: see text], [Formula: see text], [Formula: see text], the data still demand the same size of power corrections as in the Standard Model. In the presence of chirality-flipped operators, all but one of the power corrections reduce substantially.