The role of $N^*(2120)$ nucleon resonance in $KΛ(1520)$ photon and hadronic productions

Abstract

The associate $KΛ(1520)$ photon and hadronic production in the $γp \to K^+Λ(1520)$, $p p \to p K^+ Λ(1520)$ and $π^- p \to K^0 Λ(1520)$ reactions are investigated within the effective Lagrangian approach and the isobar model. We are interested in the contribution from the $N^*(2120)$ (previously called $N^*(2080)$) resonance, which has a significant coupling to the $KΛ(1520)$ channel. The theoretical results show that the current experimental data for the $γp \to K^+Λ(1520)$ reaction favor the existence of the $N^*(2120)$ resonance, and that these measurements can be used to further constrain its properties. We present results, including the $N^*(2120)$ contribution, for total cross sections of the $γp \to K^+Λ(1520)$, $π^- p \to K^0 Λ(1520)$, and $p p \to p K^+ Λ(1520)$ reactions. For this latter one, we also calculate invariant mass and Dalitz plot distributions.

Talk given at the workshop on Hadron Nuclear Physics, Zhangjiajie, China, July 18 to 22, 2013