Electromagnetic splittings and light quark masses in lattice QCD
Journal Article
·
· Physical Review Letters
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15620 (United States)
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 {beta}=5.7 with Wilson action, the {pi}{sup +}-{pi}{sup 0} splitting is found to be 4.9(3) MeV. Using the measured {ital K}{sup 0}-{ital K}{sup +} splitting, we also find {ital m}{sub {ital u}}/{ital m}{sub {ital d}}=0.512(6). Systematic errors are discussed. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Fermi National Accelerator Laboratory
- DOE Contract Number:
- AC02-76CH03000; AS05-89ER40518
- OSTI ID:
- 285710
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 21 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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