omega-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) identifier 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
  • Middle East Technical University Affiliated: Yes

Abstract

The omega-meson photoproduction, gamma + p --> p + omega, is studied in the framework of a model, containing pi-meson exchange in t-channel and nucleon-exchange in s- and u-channels. Considering both omegaNN, 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 l-dependence of the differential cross-sections, dsigma(gamma + p --> p + omega)/dl, in the near-threshold region Egamma less than or equal to 2 GeV. These sets of,earn coupling constants, corresponding to destructive and constructive pi X N-interference contributions to dsigma/dt can be well distinguished by measurements of beam asymmetry, induced by linear photon polarization.