Contribution to a conference proceedings

FZJ-2016-08011

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Leptonic decay-constant ratio $f_K/f_\pi$ from clover-improved $N_f=2+1$ QCD

Scholz, E. E. (Corresponding author) ; Durr, S. (Corresponding author)FZJ*

2016
Proceedings of Science

This record in other databases:

Please use a persistent id in citations: http://hdl.handle.net/2128/13434

Abstract: 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 $V_{\rm us}$.

Note: PoS(LATTICE 2016)283

---

Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 511 - Computational Science and Mathematical Methods (POF3-511) (POF3-511)

Appears in the scientific report 2016

---

Database coverage:
;

---