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Momentum dependent vertices σγγ, σργ and σρρ the NJL scalar hidden by chiral symmetry |
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| Authors: | B. Bajc A. H. Blin B. Hiller M. C. Nemes M. Rosina |
| Affiliation: | 1. Institut Jo?ef Stefan, Jamova 39, p.p. 100, 61111, Ljubljana, Slovenia 2. Departamento de Física, Centro de Fisica Teórica, P-3000, Coimbra, Portugal 3. Departamento de Fisica, ICEX, Universidade Federal de Minas Gerais, C.P. 702, 31270, Belo Horizonte-MG, Brasil 4. Department of Physics, University of Ljubljana, Jadranska 19, p.p. 64, 61111, Ljubljana, Slovenia |
| Abstract: | We calculate the momentum dependence of three particle verticesσγγ, σργ andσρρ in the context of a Nambu Jona Lasinio type model. We show how they influence the processesγγ→σ→ππ, ρ→γσ andγγ→ρρ and how chiral symmetry shadows the presence of theσ. |
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