Phys. Rev. Lett. 76, 3894–3897 (1996)Electromagnetic Splittings and Light Quark Masses in Lattice QCDReceived 5 February 1996; published in the issue dated 20 May 1996 A method for computing electromagnetic properties of hadrons in lattice QCD is described and preliminary numerical results are presented. The electromagnetic field is introduced dynamically, using a noncompact formulation. Employing enhanced electric charges, the dependence of the pseudoscalar meson mass on the (anti)quark charges and masses can be accurately calculated. At β = 5.7 with Wilson action, the π+-π0 splitting is found to be 4.9(3) MeV. Using the measured K0-K+ splitting, we also find mu/md = 0.512(6). Systematic errors are discussed. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.76.3894
DOI:
10.1103/PhysRevLett.76.3894
PACS:
12.38.Gc, 13.40.Dk, 14.65.Bt
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