Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-08-05
Phys.Rev. D61 (2000) 045008
Physics
High Energy Physics
High Energy Physics - Theory
21 pages, 5 epsf figures
Scientific paper
10.1103/PhysRevD.61.045008
The non-perturbative renormalization group equation for the Wilsonian effective potential is given in a certain simple approximation scheme in order to study chiral symmetry breaking phenomena dynamically induced by strong gauge interactions. The evolving effective potential is found to be non-analytic in infrared, which indicates spontaneous generation of the fermion mass. It is also shown that the renormalization group equation gives the identical effective fermion mass with that obtained by solving the Schwinger-Dyson equation in the (improved) ladder approximation. Moreover introduction of the collective field corresponding to the fermion composite into the theory space is found to offer an efficient method to evaluate the order parameters; the dynamical mass and the chiral condensate. The relation between the renormalization group equation incorporating the collective field and the Schwinger-Dyson equation is also clarified.
Aoki Ken-Ichi
Morikawa Keiichi
Sumi Jun-Ichi
Terao Haruhiko
Tomoyose Masashi
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