Nucleon resonances in the $\gamma p\to \varphi K^{+}\Lambda$ reaction near threshold

Abstract

We investigate the $\gamma p\to \varphi K^{+}\Lambda$ reaction near threshold within an effective Lagrangian approach and the isobar model. Various nucleon resonances caused by the $\pi$ and $\eta$ meson exchanges and background contributions are considered. It is shown that the contribution from the $N^{\ast }(1535)$ resonance caused by the $\eta$ meson exchange plays the predominant role. Hence, this reaction provides a good new platform to study the $N^{\ast }(1535)$ resonance. The predicted total cross section and specific features of angular distributions can be tested by future experiments.

Comments: Publised version