omega-meson photoproduction on nucleons in the near-threshold region
EUROPEAN PHYSICAL JOURNAL A, cilt.13, sa.3, ss.355-362, 2002 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 13 Sayı: 3
- Basım Tarihi: 2002
- Doi Numarası: 10.1007/s10050-002-8764-7
- Dergi Adı: EUROPEAN PHYSICAL JOURNAL A
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.355-362
- Orta Doğu Teknik Üniversitesi Adresli: Evet
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.