Seminarium Teorii Oddziaływań Elementarnych

Precision flavour physics continues to play a central role in constraining theories beyond the Standard Model, a role which is complementary to large-energy searches at the LHC. This requires the evaluation of non-perturbatice QCD effects which can only be achieved using simulations in lattice QCD. I will use examples from kaon physics to illustrate the enormous recent progress both in the precision which can be reached and in the range of quantities which can be studied. The examples include the determination of the mass of the strange quark, of the CKM element Vus, the BK parameter of neutral kaon mixing and nonleptonic and rare kaon decays.