Electromagnetic splittings of hadrons from improved staggered quarks in full QCD
High Energy Physics - Lattice
2010-01-21 v1
Abstract
We present our initial study of the electromagnetic splittings of charged and neutral mesons, and the violation of Dashen's theorem. Hadron masses are calculated on MILC N_f=2+1 QCD ensembles at lattice spacing \approx 0.15fm, together with quenched non-compact U(1) configurations. The O(a^2) tadpole improved staggered quark (asqtad) action is used both for the sea quarks and for six different valence quark masses. Chiral extrapolations are performed using partially quenched chiral perturbation theory incorporating electromagnetic corrections.
Cite
@article{arxiv.0812.4486,
title = {Electromagnetic splittings of hadrons from improved staggered quarks in full QCD},
author = {S. Basak and A. Bazavov and C. Bernard and C. DeTar and W. Freeman and Steven Gottlieb and U. M. Heller and J. E. Hetrick and J. Laiho and L. Levkova and J. Osborn and R. Sugar and D. Toussaint},
journal= {arXiv preprint arXiv:0812.4486},
year = {2010}
}
Comments
7 pages, 7 figures, presented at the XXVI International Symposium on Lattice Field Theory, July 14-19, 2008, Williamsburg, Virginia, USA