Vector and axialvector mesons at nonzero temperature within a gauged linear sigma model

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dc.creatorStrüber, Stefan
dc.creatorRischke, Dirk H.
dc.date2007-08-17
dc.date2007-11-09
dc.date.accessioned2026-07-07T11:18:41Z
dc.date.available2026-07-07T11:18:41Z
dc.descriptionWe consider vector and axialvector mesons in the framework of a gauged linear sigma model with chiral $U(N_f)_R \times U(N_f)_L$ symmetry. For $N_f=2$, we investigate the behavior of the chiral condensate and the meson masses as a function of temperature by solving a system of coupled Dyson-Schwinger equations derived via the 2PI formalism in double-bubble approximation. We find that the inclusion of vector and axialvector mesons tends to sharpen the chiral transition. Within our approximation scheme, the mass of the $ρ$ meson increases by about 100 MeV towards the chiral transition.
dc.description20 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/0708.2389
dc.identifierhttp://arxiv.org/abs/0708.2389
dc.identifierPhys.Rev.D77:085004,2008
dc.identifierdoi:10.1103/PhysRevD.77.085004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193429
dc.subjectHigh Energy Physics - Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleVector and axialvector mesons at nonzero temperature within a gauged linear sigma model
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