Photoproduction $\gamma p\to K^{+}\Lambda (1690)$ in an effective Lagrangian approach

Neng-Chang Wei, Ai-Chao Wang, Fei Huang

A gauge-invariant model is constructed for the $\gamma p\to K^{+}\Lambda (1690)$ reaction within a tree-level effective Lagrangian approach with the purpose to understand the underlying producti…