Study on the reaction of γp → f_1(1285)p in Regge-effective Lagrangian approach

摘要

The production of the f_1(1285) resonance in the reaction of γp → f_1(1285)p is investigated within a Regge-effective Lagrangian approach. Besides the contributions of the t-channel ρ and ω trajectories exchanges, we also take into account the contributions of s-=u-channel N(2300) terms, s-=u-channel nucleon terms, and the contact term. By fitting to the CLAS data, we find that the s-channel N(2300) term plays an important role in this reaction. We predict the total cross section for this reaction and find a clear bump structure around W = 2.3 GeV, which is associated with the N(2300) state. The reaction of γp → f_1(1285)p could be useful to further study the N(2300) experimentally.