Goldstone Theorem and Diquark Confinement Beyond Rainbow-Ladder Approximation
Nuclear Theory
2010-03-04 v1 High Energy Physics - Phenomenology
Abstract
The quark Dyson-Schwinger equation and meson Bethe-Salpeter equation are studied in a truncation scheme that extends the rainbow-ladder approximation such that, in the chiral limit, the isovector, pseudoscalar meson remains massless. Quark-quark (diquark) correlations, which are bound in rainbow-ladder approximation, are destabilised by repulsive contributions that only appear at higher order in the Bethe-Salpeter kernel. The net effect of higher order terms on the meson bound-state masses is small.
Cite
@article{arxiv.nucl-th/9602012,
title = {Goldstone Theorem and Diquark Confinement Beyond Rainbow-Ladder Approximation},
author = {A. Bender and C. D. Roberts and L. v. Smekal},
journal= {arXiv preprint arXiv:nucl-th/9602012},
year = {2010}
}
Comments
11 pages, LaTeX, elsart.sty, 3 EPS figures