Mesons in a Poincare Covariant Bethe-Salpeter Approach

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dc.creatorAlkofer, R.
dc.creatorWatson, P.
dc.creatorWeigel, H.
dc.date2002-02-06
dc.date2002-03-21
dc.date.accessioned2026-07-07T11:09:13Z
dc.date.available2026-07-07T11:09:13Z
dc.descriptionWe develop a covariant approach to describe the low-lying scalar, pseudoscalar, vector and axialvector mesons as quark-antiquark bound states. This approach is based on an effective interaction modeling of the non--perturbative structure of the gluon propagator that enters the quark Schwinger-Dyson and meson Bethe-Salpeter equations. We consistently treat these integral equations by precisely implementing the quark propagator functions that solve the Schwinger-Dyson equations into the Bethe-Salpeter equations in the relevant kinematical region. We extract the meson masses and compute the pion and kaon decay constants. We obtain a quantitatively correct description for pions, kaons and vector mesons while the calculated spectra of scalar and axialvector mesons suggest that their structure is more complex than being quark-antiquark bound states.
dc.description18 pages LaTeX, 5 figures; some changes in the presentation, new results on axial vector mesons in enlarged mixing scheme; version to be published in Physical Review D
dc.identifierhttps://arxiv.org/abs/hep-ph/0202053
dc.identifierhttp://arxiv.org/abs/hep-ph/0202053
dc.identifierPhys.Rev.D65:094026,2002
dc.identifierdoi:10.1103/PhysRevD.65.094026
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190388
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleMesons in a Poincare Covariant Bethe-Salpeter Approach
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