paper

QCD chiral symmetry restoration with a large number of quarks in a model with a confining propagator and dynamically massive gluons

arXiv:1409.7438 · doi:10.1016/j.physletb.2015.04.007

Abstract

Considering a QCD chiral symmetry breaking model where the gap equation contains an effective confining propagator and a dressed gluon propagator with a dynamically generated mass, we verify that the chiral symmetry is restored for a large number of quarks $n_{f} \approx 7 - 13$ . We discuss the uncertainty in the results, that is related to the determination of the string tension ( $K_{F}$ ), appearing in the confining propagator, and the effective gluon mass ( $m_{g}$ ) at large $n_{f}$ .

5 pages, 6 figures