Speaker
Anastassios Vladikas
(INFN, Rome Tor Vergata)
Description
The low energy contribution to ∆S = 2 transitions beyond the standard model is described by five B-parameters. Lattice results from different research teams, as reviewed by FLAG, show tension between two of these parameters. After reviewing this situation, we describe an alternative proposal for a completely non-perturbative determination of these quantities, based on SF and $\chi$-SF renormalisation schemes. In a first preparatory phase, we show results on the RG-running of dim-3 operators (pseudoscalar and tensor) in the $\chi$-SF scheme.
