Momentum Dependent Vertices $\sigma \gamma \gamma$, $\sigma \rho \gamma$ and $\sigma \rho \rho$ : The NJL Scalar Hidden by Chiral Symmetry
msra(1994)
摘要
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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关键词
particle physics phenomenology
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