Hadronic unquenching effects in the quark propagator

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dc.creatorFischer, Christian S.
dc.creatorNickel, Dominik
dc.creatorWambach, Jochen
dc.date2007-05-30
dc.date2007-11-05
dc.date.accessioned2026-07-07T10:55:56Z
dc.date.available2026-07-07T10:55:56Z
dc.descriptionWe investigate hadronic unquenching effects in light quarks and mesons. Within the non-perturbative continuum framework of Schwinger-Dyson and Bethe-Salpeter equations we quantify the strength of the back reaction of the pion onto the quark-gluon interaction. To this end we add a Yang-Mills part of the interaction such that unquenched lattice results for various current quark masses are reproduced. We find considerable effects in the quark mass function at low momenta as well as for the chiral condensate. The quark wave function is less affected. The Gell--Mann-Oakes-Renner relation is valid to good accuracy up to pion masses of 400-500 MeV. As a byproduct of our investigation we verify the Coleman theorem, that chiral symmetry cannot be broken spontaneously when QCD is reduced to 1+1 dimensions.
dc.description27 pages, 15 figures, minor corrections and clarifications; version to appear in PRD
dc.identifierhttps://arxiv.org/abs/0705.4407
dc.identifierhttp://arxiv.org/abs/0705.4407
dc.identifierPhys.Rev.D76:094009,2007
dc.identifierdoi:10.1103/PhysRevD.76.094009
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/186246
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Lattice
dc.subjectNuclear Theory
dc.titleHadronic unquenching effects in the quark propagator
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