Dynamical model of φ meson photoproduction on the nucleon and ⁴He

Journal Article · 17 October 2021 · Physical Review C

DOI: https://doi.org/10.1103/physrevc.104.045202 · OSTI ID:1840051

Kim, Sang-Ho  ^[1]; Lee, T.-S. H.  ^[2]; Nam, Seung-il  ^[3]; Oh, Yongseok  ^[4]

---

1. Pukyong National Univ., Busan (Korea); Soongsil Univ., Seoul (Korea)
2. Argonne National Lab. (ANL), Argonne, IL (United States)
3. Pukyong National Univ., Busan (Korea); Asia Pacific Center for Theoretical Physics, Gyeongbuk (Korea)
4. Kyungpook National Univ., Daegu (Korea); Asia Pacific Center for Theoretical Physics, Gyeongbuk (Korea)

We investigate φ meson photoproduction on the nucleon and the ⁴He targets within a dynamical model approach based on a Hamiltonian which describes the production mechanisms by the Pomeron-exchange, meson-exchanges, φ radiations, and nucleon resonance excitations mechanisms. The final φN interactions are included being described by the gluon-exchange, direct φN couplings, and the box-diagrams arising from the couplings with πN, ρN, KΛ, and KΣ channels. The parameters of the Hamiltonian are determined by the experimental data of γp → φp from the CLAS Collaboration. The resulting Hamiltonian is then used to predict the coherent φ-meson production on the ⁴He targets by using the distorted-wave impulse approximation. For the proton target, the final φN rescattering effects, as required by the unitarity condition, are found to be very weak, which supports the earlier calculations in the literature. For the ⁴He targets, the predicted differential cross sections are in good agreement with the data obtained by the LEPS Collaboration. Furthermore, the role of each mechanism in this reaction is discussed and predictions for a wide range of scattering angles are presented, which can be tested in future experiments.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 1840051
• Journal Information: Physical Review C, Journal Name: Physical Review C Journal Issue: 4 Vol. 104; ISSN 2469-9985
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English