Speaker
Aaron Torok
(Indiana U.)
Description
We extend MILC's initial study of the electromagnetic splittings of charged and neutral mesons, and the violation of Dashen’s theorem. Meson masses are calculated using the MILC Nf = 2 + 1, staggered SU(3) gauge configurations, and independently generated U(1) gauge configurations. The meson correlators are calculated using SU(3)xU(1) gauge fields. A large fraction of the meson correlators are calculated using an implementation of the MILC staggered multi-mass inverter that runs on a single NVIDIA GPU in double precision. When the current analysis is complete, we will have results at three lattice spacings, from about 0.15 to 0.09 fm, with several light quark masses at each lattice spacing. Once electromagnetic effects are included in the corresponding rooted, staggered chiral perturbation theory calculations, we should have excellent control over the chiral and continuum limits.
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Primary author
Aaron Torok
(Indiana U.)
Co-authors
Alexei Bazavov
(U. of Arizona)
Carleton DeTar
(U. of Utah)
Claude Bernard
(Washington U.)
Doug Toussaint
(U. of Arizona)
Elizabeth Freeland
(Washington U.)
Guochun Shi
(NCSA)
James Hetrick
(U. of the Pacific)
James Osborn
(Argonne Natl. Lab.)
John Laiho
(U. of Glasgow)
Ludmila Levkova
(U. of Utah)
Mehmet Oktay
(U. of Utah)
Robert Sugar
(U.C. Santa Barbara)
Ruth Van de Water
(Brookhaven Natl. Lab.)
Steven Gottlieb
(Indiana U.)
Subhasish Basak
(NISER)
Urs Heller
(American Physical Society)
Walter Freeman
(U. of Arizona)
