On the Quark and Gluon Substructure of the Sigma and other Scalar Mesons

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dc.creatorNarison, Stephan
dc.date2000-09-10
dc.date.accessioned2026-07-07T03:42:34Z
dc.date.available2026-07-07T03:42:34Z
dc.descriptionWithin the increasing experimental evidence of the existence of the I=0 scalar low mass and wide σmeson, we review the {\it first} analysis of its quark and gluon substructure from QCD spectral sum rules and some low-energy theorems. The present data favour equal components of \bar uu+ \bar dd and of gg in its wave function, which make the wide sigma and the narrow f_0(980) as η'-like particles. A coherent picture of the other I=0 scalar mesons spectra within this mixing scheme is shortly discussed. We also expect the a_0(980) to be the lowest isovector \bar ud state, and the K^*_0(1430) its \bar ds partner.
dc.descriptionLatex2e sources 8 pages including 1 Table + espcrc1.sty file. Plenary talk given at the Workshop on `` Possible existence of the Light $σ$-resonance and its applications to hadron physics" (Yukawa Institute for Theoretical Physics, Kyoto, Japan, 11-14th June 2000) and Review talk given at the QCD 00 International Euroconference (15th anniversary) Montpellier, France 6-13th July 2000
dc.identifierhttps://arxiv.org/abs/hep-ph/0009108
dc.identifierhttp://arxiv.org/abs/hep-ph/0009108
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/39937
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.subjectHigh Energy Physics - Lattice
dc.subjectNuclear Theory
dc.titleOn the Quark and Gluon Substructure of the Sigma and other Scalar Mesons
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