Electromagnetic effects on the light hadron spectrum

Authors :: MILC Collaboration
Basak, S.
Bazavov, A.
Bernard, C.
DeTar, C.
Freeland, E.
Foley, J.
Gottlieb, Steven
Heller, U. M.
Komijani, J.
Laiho, J.
Levkova, L.
Li, R.
Osborn, J.
Sugar, R. L.
Torok, A.
Toussaint, D.
Van de Water, R. S.
Zhou, R.
MILC Collaboration
Basak, S.
Bazavov, A.
Bernard, C.
DeTar, C.
Freeland, E.
Foley, J.
Gottlieb, Steven
Heller, U. M.
Komijani, J.
Laiho, J.
Levkova, L.
Li, R.
Osborn, J.
Sugar, R. L.
Torok, A.
Toussaint, D.
Van de Water, R. S.
Zhou, R.
Publication Year :: 2015
Abstract: For some time, the MILC Collaboration has been studying electromagnetic effects on light mesons. These calculations use fully dynamical QCD, but only quenched photons, which suffices to NLO in XPT. That is, the sea quarks are electrically neutral, while the valence quarks carry charge. For the photons we use the non-compact formalism. We have new results with lattice spacing as small as 0.045 fm and a large range of volumes. We consider how well chiral perturbation theory describes these results and the implications for light quark masses<br />Comment: Comments: 6 pages, 4 figures. Proceedings of the XXVI IUPAP Conference on Computational Physics (CCP2014), held at Boston University