Critical coupling for dynamical chiral-symmetry breaking
- 15 January 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 41 (2), 672-678
- https://doi.org/10.1103/physrevd.41.672
Abstract
We study chiral-symmetry breaking in a model of quantum chromodynamics (QCD). In our study we make a critical analysis of an approximation that is often used in QCD and other theories to simplify the Schwinger-Dyson equation for the fermion self-energy. Solving the Schwinger-Dyson equation numerically, without employing the approximation, we find that chiral symmetry is restored when the running coupling constant at zero momentum transfer falls below 0.890.Keywords
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