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

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

Abstract:

The ω-meson photoproduction, γ + pp + 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 + pp + ω)/dt, in the near-threshold region Eγ? 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.

PACS. 13.60.Le Meson production – 13.88.+e Polarization in interactions and scattering – 24.70.+s Polarization phenomena in reactions – 25.20.Lj Photoproduction reactions 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2002

Authors and Affiliations

  • H. Babacan
    • 1
  • T. Babacan
    • 1
  • A. Gokalp
    • 1
  • O. Yilmaz
    • 1
  1. 1.Physics Department, Middle East Technical University, 06531 Ankara, TurkeyTR

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