Analysis of a quenched lattice-QCD dressed-quark propagator

被引：184

作者：

Bhagwat, MS ^{[1
]}

Pichowsky, MA

Roberts, CD

Tandy, PC

机构：

[1] Kent State Univ, Dept Phys, Nucl Res Ctr, Kent, OH 44242 USA

[2] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW C | 2003年 / 68卷 / 01期

关键词：

D O I：

10.1103/PhysRevC.68.015203

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Quenched lattice-QCD data on the dressed-quark Schwinger function can be correlated with dressed-gluon data via a rainbow gap equation so long as that equation's kernel possesses enhancement at infrared momenta above that exhibited by the gluon alone. The required enhancement can be ascribed to a dressing of the quark-gluon vertex. The solutions of the rainbow gap equation exhibit dynamical chiral symmetry breaking and are consistent with confinement. The gap equation and related, symmetry-preserving ladder Bethe-Salpeter equation yield estimates for chiral and physical pion observables that suggest these quantities are materially underestimated in the quenched theory; \[(q) over barq]\ by a factor of 2 and f(pi) by 30%.

引用

页码：152031 / 152039

页数：9

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