The chirally improved quark propagator and restoration of chiral symmetry

Abstract

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.

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

References in corpus (4)

• Lattice QCD as a video game
• Restoration of chiral and $U(1{)}_A$ symmetries in excited hadrons
• Hadron Spectroscopy with Dynamical Chirally Improved Fermions
• Unquenching effects in the quark and gluon propagator

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