Gluons in two-color QCD at high baryon density

Abstract

Landau gauge longitudinal and transverse gluon propagators are studied in lattice QCD with gauge group [Formula: see text] at varying temperature and quark density. In particular, it is found that the longitudinal propagator decreases with increasing quark chemical potential at all temperatures under study, whereas the transverse propagator increases with increasing quark chemical potential at [Formula: see text] MeV and does not depend on it at higher temperatures. The relative strength of chromoelectric and chromomagnetic interactions is also discussed.