%0 Conference Paper
%A Scholz, Enno E.
%A Durr, Stephan
%T Leptonic decay-constant ratio $f_K/f_\pi$ from clover-improved $N_f=2+1$ QCD
%I Proceedings of Science
%M FZJ-2016-08011
%P 283
%D 2016
%Z PoS(LATTICE 2016)283
%X The leptonic decay-constant ratio $f_K/f_\pi$ is calculated from lattice-QCD simulations using $N_f=2+1$ dynamical fermion flavors in the clover-improved formulation and 2-HEX smearing. The simulations were performed for a range of mass-degenerate light quarks including the physical point and at various lattice couplings and volumes, allowing to quantify all relevant sources of systematic uncertainties for our final number of the decay-constant ratio. Utilizing input from chiral perturbation theory, we also quote the charged decay-constant ratio $f_{K^\pm}/f_{\pi^\pm}$. With further input from super-allowed nuclear $\beta$-decays, eventually we obtain an estimate for the CKM-matrix element $V_{\rm us}$.
%B 34th International Symposium on Lattice Field Theory
%C 25 Jul 2016 - 30 Jul 2016, Southampton (UK)
Y2 25 Jul 2016 - 30 Jul 2016
M2 Southampton, UK
%F PUB:(DE-HGF)8
%9 Contribution to a conference proceedings
%U https://juser.fz-juelich.de/record/825550