Neutral meson oscillations on the lattice

Abstract

Accurate measurements of K, D and B meson mixing amplitudes provide stringent constraints in the Unitary Triangle analysis, as well as useful bounds on New Physics scales. Lattice QCD provides a non perturbative tool to compute the hadronic matrix elements entering in the effective weak Hamiltonian, with errors at a few percent level and systematic uncertainties under control. I review recent lattice results for these hadronic matrix element performed with $N_f=2$, $N_f=2+1$ and $N_f=2+1+1$ dynamical sea quarks.

Comments: 7 pages, 4 figures, 6 tables. Proceedings of the 37th International Conference on High Energy Physics. 2-9 July 2014, Valencia, Spain. Table 6 modified; comments on the comparison added