Dyson-Schwinger equations: a tool for hadron physics
摘要
Dyson-Schwinger equations furnish a Poincare' covariant framework within which to study hadrons. A particular feature is the existence of a nonperturbative, symmetry preserving truncation that enables the proof of exact results. The gap equation reveals that dynamical chiral symmetry breaking is tied to the long-range behaviour of the strong interaction, which is thereby constrained by observables, and the pion is precisely understood, and seen to exist simultaneously as a Goldstone mode and a bound state of strongly dressed quarks. The systematic error associated with the simplest truncation has been quantified, and it underpins a one-parameter model efficacious in describing an extensive body of mesonic phenomena. Incipient applications to baryons have brought successes and encountered challenges familiar from early studies of mesons, and promise a covariant field theory upon which to base an understanding of contemporary large momentum transfer data.
引用
@article{arxiv.nucl-th/0301049,
title = {Dyson-Schwinger equations: a tool for hadron physics},
author = {P. Maris and C. D. Roberts},
journal= {arXiv preprint arXiv:nucl-th/0301049},
year = {2010}
}
备注
67 pages, LaTeX2e, Review