Analysis of the Wilsonian effective potentials in dynamical chiral symmetry breaking - INSPIRE

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Analysis of the Wilsonian effective potentials in dynamical chiral symmetry breaking

Aug, 1999

21 pages

Published in:

Phys.Rev.D 61 (2000) 045008

e-Print:

hep-th/9908043 [hep-th]

DOI:

10.1103/PhysRevD.61.045008

Report number:

KANAZAWA-99-12,
KUCP-0140

View in:

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Abstract:

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.

Note:

21 pages, 5 epsf figures Report-no: KANAZAWA-99-12, KUCP-0140

quantum electrodynamics
fermion: chiral
effective potential
symmetry breaking: chiral
dynamical symmetry breaking
critical phenomena
renormalization group
perturbation theory: higher-order
Dyson-Schwinger equation

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