# Study on the reaction of $\gamma p \to f_1(1285) p$ in Regge-effective Lagrangian approach

## TL;DR

This study investigates the photoproduction of the $f_1(1285)$ resonance on protons using a Regge-effective Lagrangian approach, highlighting the significance of the $N(2300)$ resonance in the reaction dynamics.

## Contribution

It introduces a comprehensive model including various channels and fits to experimental data, emphasizing the role of the $N(2300)$ resonance in $f_1(1285)$ production.

## Key findings

- The $s$-channel $N(2300)$ term is crucial for explaining the data.
- A bump in the cross section around $W=2.3$ GeV indicates the $N(2300)$ contribution.
- The reaction can serve as a probe for studying the $N(2300)$ resonance.

## Abstract

The production of the $f_1(1285)$ resonance in the reaction of $\gamma p \rightarrow f_1(1285) p$ is investigated within a Regge-effective Lagrangian approach. Besides the contributions of the $t$-channel $\rho$ and $\omega$ 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 $\gamma p \to f_1(1285) p$ could be useful to further study of the $N(2300)$ experimentally.