Flavour breaking effects in the pseudoscalar meson decay constants
High Energy Physics - Lattice
2017-02-22 v1 High Energy Physics - Phenomenology
Abstract
The SU(3) flavour symmetry breaking expansion in up, down and strange quark masses is extended from hadron masses to meson decay constants. This allows a determination of the ratio of kaon to pion decay constants in QCD. Furthermore when using partially quenched valence quarks the expansion is such that SU(2) isospin breaking effects can also be determined. It is found that the lowest order SU(3) flavour symmetry breaking expansion (or Gell-Mann-Okubo expansion) works very well. Simulations are performed for 2+1 flavours of clover fermions at four lattice spacings.
Cite
@article{arxiv.1612.04798,
title = {Flavour breaking effects in the pseudoscalar meson decay constants},
author = {V. G. Bornyakov and R. Horsley and Y. Nakamura and H. Perlt and D. Pleiter and P. E. L. Rakow and G. Schierholz and A. Schiller and H. Stüben and J. M. Zanotti},
journal= {arXiv preprint arXiv:1612.04798},
year = {2017}
}
Comments
16 pages, 15 figures