Schwinger functions and light-quark bound states, and sigma terms

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dc.creatorHoell, A.
dc.creatorMaris, P.
dc.creatorRoberts, C. D.
dc.creatorWright, S. V.
dc.date2005-12-13
dc.date.accessioned2026-07-07T10:30:45Z
dc.date.available2026-07-07T10:30:45Z
dc.descriptionWe explore the viability of using solely spacelike information about a Schwinger function to extract properties of bound states. In a concrete example it is not possible to determine properties of states with masses \gsim 1.2 GeV. Modern Dyson-Schwinger equation methods supply a well-constrained tool that provide access to hadron masses and σ-terms. We report values of the latter for a range of hadrons. Of interest is analysis relating to a u,d scalar meson, which is compatible with a picture of the lightest 0^{++} as a bound state of a dressed-quark and -antiquark supplemented by a material pion cloud. A constituent-quark σ-term is defined, which affords a means for assessing the flavour-dependence of dynamical chiral symmetry breaking.
dc.descriptionTo appear in the proceedings of Workshop on Light-Cone QCD and Nonperturbative Hadron Physics 2005 (LC 2005), Cairns, Queensland, Australia, 7-15 Jul 2005
dc.identifierhttps://arxiv.org/abs/nucl-th/0512048
dc.identifierhttp://arxiv.org/abs/nucl-th/0512048
dc.identifierNucl.Phys.Proc.Suppl.161:87-94,2006
dc.identifierdoi:10.1016/j.nuclphysbps.2006.08.010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178225
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSchwinger functions and light-quark bound states, and sigma terms
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