1999/09/22 by Q. Zhao, Zhao, Q., J. P. Didelez +7
Physics and Astronomy · #FOS: Physical sciences #Nuclear Theory (nucl-th) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.48550/arxiv.nucl-th/9909059
Contribution to "2nd International Conference on Perspectives in Hadronic Physics", Trieste, ICTP, 10-14 May 1999, to appear in Few-body System
arxiv created 1999/09/22 · openalex publication_date 1999/09/22 · arxiv updated 2009/12/01 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28
The resonance effects are investigated in the ϕ meson photoproduction near threshold through a quark model approach with an effective Lagrangian. The diffractive contribution is consistently estimated by the \it t-channel Pomeron exchange. Another non-diffractive process, \it t-channel π0 exchange is also included. The numerical result shows that the Pomeron exchange plays dominant role in the ϕ meson photoproduction, while the cross sections of the non-diffractive processes, i.e. \it s- and \it u-channel excitations, and \it t-channel π0 exchange, are quite small. In the polarization observables, we find that large asymmetries are produced in the backward direction by the interferences from the \it s- and \it u-channel resonances, while in the forward direction, only very small asymmetries are generated. Meanwhile, we find that the effects from the π0 exchange are generally negligible.