omega-meson photoproduction on nucleons in the near-threshold region


Babacan H., Babacan T., Gokalp A., Yilmaz O.

EUROPEAN PHYSICAL JOURNAL A, cilt.13, ss.355-362, 2002 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 13 Konu: 3
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1007/s10050-002-8764-7
  • Dergi Adı: EUROPEAN PHYSICAL JOURNAL A
  • Sayfa Sayıları: ss.355-362

Özet

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.