arXiv:hep-th/0002038·v2·High Energy Physics — Theory
Non-ladder Extended Renormalization Group Analysis of the Dynamical Chiral Symmetry Breaking
Ken-Ichi Aoki🇯🇵 · Kaoru Takagi🇯🇵 · Haruhiko Terao🇯🇵 · Masashi Tomoyose🇯🇵
Abstract
The order parameters of dynamical chiral symmetry breaking in QCD, the dynamical mass of quarks and the chiral condensates, are evaluated by numerically solving the Non-Perturbative Renormalization Group (NPRG) equations. We employ an approximation scheme beyond ``the ladder'', that is, beyond the (improved) ladder Schwinger-Dyson equations. The chiral condensates are enhanced compared with the ladder ones, which is phenomenologically favorable. The gauge dependence of the order parameters is fairly reduced in this scheme.
Comments: 18 pages, 30 eps file, 15 figures, LaTeX, slightly revised, references corrected, To be published in Prog. Theo. Phys