Momentum Dependent Vertices $σγγ$, $σργ$ and $σρρ$ : The NJL Scalar Hidden by Chiral Symmetry

Details Momentum Dependent Vertices $σγγ$, $σργ$ and $σρρ$ : The NJL Scalar Hidden by Chiral Symmetry Momentum Dependent Vertices $σγγ$, $σργ$ and $σρρ$ : The NJL Scalar Hidden by Chiral Symmetry

1994-07-19

arxiv.org/abs/hep-ph/9407327v1

Z.Phys. A350 (1994) 229-235

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages (latex), 5 figures available from the authors, preprint Coimbra 940506, IJS-TP-94/10, accepted for publication in Zeit

Scientific paper

We calculate the momentum dependence of three particle vertices $\sigma \gamma \gamma$, $\sigma \rho \gamma$ and $\sigma \rho \rho$ in the context of a Nambu Jona Lasinio type model. We show how they influence the processes $\gamma \gamma \rightarrow \sigma \rightarrow \pi \pi$, $\rho \rightarrow \gamma \sigma$ and $\gamma \gamma \rightarrow \rho \rho$ and how chiral symmetry shadows the presence of the $\sigma$.

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