Photo-production of lowest state within the Regge-effective Lagrangian approach*

Abstract

Abstract Because the lowest state with quantum numbers spin-parity is far from being established experimentally and theoretically, we perform a theoretical study on the photo-production within the Regge-effective Lagrangian approach. Considering that couples to the channel, we study the contributions from the t-channel K exchange diagram. Moreover, the contributions from the t-channel exchange, s-channel nucleon pole, u-channel Σ exchange, and contact term are considered. The differential and total cross sections of the process are predicted with our model parameters. The results should help in experimentally searching for the state in the future.