Strong three-meson couplings of J/ψ and ηc

Abstract : We discuss the strong couplings gPPV and gVVP for vector (V) and pseudoscalar (P) mesons, at least one of which is a charmonium state J/ψ or ηc. The strong couplings are obtained as residues at the poles of suitable form factors, calculated in a broad range of momentum transfers using a dispersion formulation of the relativistic constituent quark model. The form factors obtained in this approach satisfy all constraints known for these quantities in the heavy-quark limit. Our results suggest sizably higher values for the strong meson couplings than those reported in the literature from QCD sum rules.
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Physical Review D, American Physical Society, 2016, 93, pp.016004 〈10.1103/PhysRevD.93.016004〉
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Contributeur : Sophie Heurteau <>
Soumis le : mercredi 13 avril 2016 - 11:42:03
Dernière modification le : jeudi 11 janvier 2018 - 06:12:41

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W. Lucha, D. Melikhov, H. Sazdjian, S. Simula. Strong three-meson couplings of J/ψ and ηc. Physical Review D, American Physical Society, 2016, 93, pp.016004 〈10.1103/PhysRevD.93.016004〉. 〈in2p3-01301901〉

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