%AYamada, Hirofumi
%D1992
%I; Tokyo Univ., Tanashi (Japan). Inst. for Nuclear Study
%J
%K72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS, CHIRAL SYMMETRY, QUANTUM CHROMODYNAMICS, SYMMETRY BREAKING, HARTREE-FOCK METHOD, PERTURBATION THEORY, FLAVOR MODEL, REST MASS, PROPAGATOR, 662120, 662230, SYMMETRY, CONSERVATION LAWS, CURRENTS AND THEIR PROPERTIES
%PMedium: X; Size: 25 p.
%TSpontaneous symmetry breaking in QCD
%XWe study dynamical chiral symmetry breaking in QCD by the use of the generalized Hartree-Fock method. The low energy quark mass is calculated to the second order of diagrammatic expansion around shifted perturbative vacuum where quarks are massive. We show that the low energy mass is finite and renormalization group invariant. We find that the finite mass gap emerges as the solutions of gap equation and stationarity condition, thereby breaking the chiral symmetry. We also discuss the possibility that the breaking solution may exist up to all orders. (author).
%0Technical Report
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