Speaker
Ana M. Teixeira
(LPC Clermont)
Description
In view of the expected experimental precision, light meson leptonic decays have a unique potential to probe deviations from the Standard Model estimates on lepton flavour universality, and thus signal the presence of New Physics.
We briefly review supersymmetric contributions to the ratio $R_{K}$, which are in general unable to saturate the current experimental bounds due to a strong tension with different flavour observables. We then focus on the SM minimally extended by sterile neutrinos, where a tree-level enhancement of lepton flavour universality violation in light meson decays arises from modified W-l-nu couplings. We illustrate these effects in the context of the inverse seesaw, showing that one can saturate the current experimental bound on $\Delta r_{K}$ (and $\Delta r_{\pi}$), in agreement with the different experimental and observational constraints.
Author
Ana M. Teixeira
(LPC Clermont)
