2024/08/21 by Neng-Chang Wei, Ai-Chao Wang, Wei, Neng-Chang +3
Economics, Econometrics and Finance · Mathematics · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #Stochastic processes and financial applications #advanced mathematical theories
paper · pdf · doi:10.48550/arxiv.2408.11352
openalex publication_date 2024/08/21 · openalex created_date 2024/12/16 · openalex updated_date 2026/07/28
The most recent data on differential cross sections and photon beam asymmetries Σ from the LEPS2/BGOegg Collaboration for the γp → f0(980) p reaction are analyzed within a tree-level effective Lagrangian approach. The t-channel ρ and ω exchanges, the u- and s-channel N exchanges, the interaction current, and the possible s-channel N^* exchanges are taken into account in constructing the reaction amplitudes to reproduce the data. The results show that the contributions from either the N(2040)3/2+ or the N(2100)1/2+ resonance exchange in the s channel are necessarily required to describe the LEPS2/BGOegg data and they dominate the differential cross sections of γp → f0(980) p. Further analysis shows that the contributions from the t-channel ρ and ω exchanges and the interaction current are rather small to both differential cross sections and photo beam asymmetries, and the contributions from u-channel N exchange are considerable in the case of including N(2040)3/2+ in the model while negligible in the case of including N(2100)1/2+ in the model. Predictions of target asymmetries T for γp → f0(980) p are given, which can be examined by future experiments.