Unquenching the infrared sector of QCD
arXiv:1301.2505
Abstract
We discuss the recent progress made in understanding how some fundamental results valid in the quenched infrared sector of non-Abelian Yang-Mills theories generalize to the unquenched case. In particular, we derive in the continuum an equation that allows to predict how the momentum dependence of the quenched gluon propagator is affected by the presence of a small number of dynamical quarks. In addition, we present the most recent lattice simulations of the (Landau gauge) gluon and ghost two-point sector obtained using gauge field configurations with two light and two light plus two heavy twisted-mass quark flavors. A comparison between the results obtained by these two complementary methods is then carried out.
8 pages, 3 figures; Proceedings of the Xth Quark Confinement and the Hadron Spectrum, October 8-12 (2012), Munich, Germany
References in corpus (4)
- Gluon and ghost propagators in the Landau gauge: Deriving lattice results from Schwinger-Dyson equations
- Lattice gluodynamics computation of Landau-gauge Green's functions in the deep infrared
- Chiral symmetry breaking with lattice propagators
- Gauge-invariant truncation scheme for the Schwinger-Dyson equations of QCD