Dynamical Chiral Symmetry Breaking and Determination of the Quark Masses
Oct, 1987
93 pages
Published in:
- Phys.Rev.D 38 (1988) 238
Report number:
- UGVA-DPT-1987/10-552
Citations per year
Abstract: (APS)
Using an effective-potential approach for composite operators, we study dynamical symmetry breaking in QCD-like theories with massless quarks. The analysis is extended to massive quarks in QCD with three flavors and the masses of the pseudoscalar-octet mesons and their decay constants are calculated. Renormalization-group corrections are taken into account. The effective potential depends on the standard parameters of QCD: ΛQCD, mu, md, ms and on a mass scale μ which discriminates between the infrared and the ultraviolet regimes. A good fit for the meson masses (agreement within 3%) and for the decay constants is obtained for the following values of the quark masses at 1 GeV: mu=5.8 MeV, md=8.4 MeV, and ms=118 MeV. These values essentially agree with the values obtained by quite different methods.- GAUGE FIELD THEORY: SU(N)
- SYMMETRY: CHIRAL
- DYNAMICAL SYMMETRY BREAKING
- FERMION: MASS
- MASS: FERMION
- FERMION: FLAVOR
- HADRON SPECTROSCOPY
- PSEUDOSCALAR MESON: MASS
- MASS: PSEUDOSCALAR MESON
- RENORMALIZATION GROUP
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