Quasifermion spectrum at finite temperature from coupled Schwinger-Dyson equations for a fermion-boson system

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dc.creatorHarada, Masayasu
dc.creatorNemoto, Yukio
dc.date2008-03-22
dc.date2008-06-30
dc.date.accessioned2026-07-07T11:33:18Z
dc.date.available2026-07-07T11:33:18Z
dc.descriptionWe nonperturbatively investigate a fermion spectrum at finite temperature in a chiral invariant linear sigma model. Coupled Schwinger-Dyson equations for fermion and boson are developed in the real time formalism and solved numerically. From the coupling of a massless fermion with a massive boson, the fermion spectrum shows a three-peak structure at some temperatures even for the strong coupling region. This means that the three-peak structure which was originally found in the one-loop calculation is stable against higher order corrections even in the strong coupling region.
dc.description10 pages, 10 figures, minor changes on discussion on renormalization, typos corrected, version to appear in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/0803.3257
dc.identifierhttp://arxiv.org/abs/0803.3257
dc.identifierPhys.Rev.D78:014004,2008
dc.identifierdoi:10.1103/PhysRevD.78.014004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197844
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleQuasifermion spectrum at finite temperature from coupled Schwinger-Dyson equations for a fermion-boson system
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