Rare and forbidden Kaon decays - 1
- Silvia Martellotti (INFN e Laboratori Nazionali di Frascati (IT))
After a brief review of some theoretical aspects and difficulties related to the calculation of rare kaon decays in the SM, I describe recent work done in the particular case of the K→ pill decay
Previous lattice calculations by the RBC and UKQCD collaborations, at an unphysical pion mass, have successfully extracted the matrix elements needed to describe the form factor of the $K \to \pi\ell^+\ell^-$ decay.
I will present the latest results of the calculation at the physical point and discuss future outlooks.
The NA62 experiment at CERN collected a large sample of charged kaon decays into final states with multiple charged particles in 2016-2018. The sensitivity to a range of lepton flavour and lepton number violating kaon decays provided by this data set improves over the previously reported measurements. Results from the searches for these processes with a partial NA62 data sample are presented.
Rare decays are fundamental probes for physics beyond the Standard Model, and the expanding LHCb programme on strange physics provides unique and complementary information with respect to the beauty and charm sectors. Recent results of rare kaon decays at LHCb will be presented as well as prospects for strange physics with the LHCb Upgrade.