ω-Meson photoproduction on nucleons in the near-threshold region

BABACAN H., Babacan T., Gokalp A., YILMAZ O.

European Physical Journal A, vol.13, no.3, pp.355-362, 2002 (SCI-Expanded, Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 3
  • Publication Date: 2002
  • Doi Number: 10.1007/s10050-002-8764-7
  • Journal Name: European Physical Journal A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.355-362
  • Manisa Celal Bayar University Affiliated: Yes

Abstract

The ω-meson photoproduction, γ + p→p + ω, is studied in the framework of a model, containing π-meson exchange in t-channel and nucleon-exchange in s- and u-channels. Considering both ωNN coupling constants in the region of time-like meson four-momenta as the free parameters, we find different sets of solutions for these constants from the existing data on the t-dependence of the differential cross-sections, dσ(γ + p→p + ω)/dt, in the near-threshold region E γ? 2 GeV. These sets of ωNN coupling constants, corresponding to destructive and constructive π ⊗ N-interference contributions to dσ/dt can be well distinguished by measurements of beam asymmetry, induced by linear photon polarization. © Società Italiana di Fisica and Springer-Verlag 2002.