Photo-production of lowest state within the Regge-effective Lagrangian approach* *Supported by the National Natural Science Foundation of China (12192263, 12075288, 11735003, 11961141012), the Natural Science Foundation of Henan (222300420554, 232300421140), the Project of Youth Backbone Teachers of Colleges and Universities of Henan Province (2020GGJS017), the Youth Talent Support Project of Henan (2021HYTP002), the Open Project of Guangxi Key Laboratory of

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.