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arxiv: 1210.8157 · v2 · pith:NM62YLVWnew · submitted 2012-10-30 · ✦ hep-lat

Status of the MILC calculation of electromagnetic contributions to pseudoscalar masses

S. Basak , A. Bazavov , C. Bernard , C. DeTar , E. Freeland , W. Freeman , J. Foley , Steven Gottlieb
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U. M. Heller J. E. Hetrick J. Laiho L. Levkova M. Oktay J. Osborn R. L. Sugar A. Torok D. Toussaint R. S. Van de Water R. Zhou (MILC Collaboration)
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classification ✦ hep-lat
keywords electromagneticmassescontributionseffectspseudoscalaraccountasqtadattempt
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We calculate pseudoscalar masses on gauge configurations containing the effects of 2+1 flavors of dynamical asqtad quarks and quenched electromagnetism. The lattice spacings vary from 0.12 to 0.06 fm. The masses are fit with staggered chiral perturbation theory including NLO electromagnetic terms. We attempt to extract the fit parameters for the electromagnetic contributions, while taking into account the finite volume effects, and extrapolate them to the physical limit.

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