The light scalar mesons within quark models | Zendy

Eef van Beveren | Zendy

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The light scalar mesons within quark models

Author(s) -

Eef van Beveren

Publication year - 2003

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.1570585

Subject(s) - icon , citation , scalar (mathematics) , computer science , information retrieval , download , world wide web , particle physics , physics , mathematics , programming language , geometry

Low-energy meson-meson scattering data are a powerful testing ground forquark models. Here, we describe the behaviour at threshold of S-wavescattering-matrix singularities. The majority of the full scattering-matrix mesonic poles stem from anunderlying confinement spectrum. However, the light scalar mesons K0*(830),a0(980), f0(400-1200), and f0(980) do not, but instead originate in 3P0-barriersemi-bound states. We show that the behaviour of the corresponding poles isidentical at threshold. In passing, the light-meson sector is given a firm basis.Comment: Plain LaTeX, 16 pages Contribution to the Second International Workshop on Hadron Physics, Effective Theories of Low Energy QCD, 25-29 September, 2002 (Coimbra, Portugal

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