The chirally improved quark propagator and restoration of chiral symmetry

Details The chirally improved quark propagator and restoration of chiral symmetry The chirally improved quark propagator and restoration of chiral symmetry

2011-12-21

arxiv.org/abs/1112.5107v2

Phys. Lett. B 711 (2012) 217-224

Physics

High Energy Physics

High Energy Physics - Lattice

9 pages, 8 figures; accepted at Phys. Lett. B

Scientific paper

10.1016/j.physletb.2012.04.008

The chirally improved (CI) quark propagator in Landau gauge is calculated in two flavor lattice Quantum Chromodynamics. Its wave-function renormalization function $Z(p^2)$ and mass function $M(p^2)$ are studied. To minimize lattice artifacts, tree-level improvement of the propagator and tree-level correction of the lattice dressing functions is applied. Subsequently the CI quark propagator under Dirac operator low-mode removal is investigated. The dynamically generated mass in the infrared domain of the mass function is found to dissolve continuously as a function of the reduction level and strong suppression of $Z(p^2)$ for small momenta is observed.

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