arXiv:1111.3958·v1·High Energy Physics — Lattice
Electromagnetic corrections to pseudoscalar decay constants
Benjamin Glaessle🇩🇪 · Gunnar S. Bali (QCDSF Collaboration)🇩🇪
Abstract
The effects of electromagnetic interactions on pseudoscalar decay constants are investigated. Using a compact QED and QCD action we are able to resolve differences of about 0.1 MeV. We obtain the preliminary results f_pi^0-f_pi^+/- =0.09(3) MeV and f_D^0-f_D^+/- =0.79(11) MeV for light and charmed pseudoscalar decay constants on a N_f=2 nonperturbatively improved Sheikholeslami-Wohlert ensemble.
Comments: 7 pages, 3 figures. Talk presented at the XXIX International Symposium on Lattice Field Theory, Lattice2011, Squaw Valley, Lake Tahoe, California, July 2011