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 Nf = 2 + 1 QCD ensembles at lattice spacing ≈ 0.15 fm, together with quenched non-compact U (1) configurations. The O (a2) 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.
|Original language||English (US)|
|Journal||Proceedings of Science|
|State||Published - Jan 1 2008|
|Event||26th International Symposium on Lattice Field Theory, LATTICE 2008 - Williamsburg, United States|
Duration: Jul 14 2008 → Jul 19 2008
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