A reggeized model for eta and eta-prime photoproduction

Details A reggeized model for eta and eta-prime photoproduction A reggeized model for eta and eta-prime photoproduction

2002-12-30

arxiv.org/abs/nucl-th/0212106v2

Phys.Rev. C68 (2003) 045202

Physics

Nuclear Physics

Nuclear Theory

24 pages, 15 figures, modified version to appear in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.68.045202

A reggeized model for \eta and \eta' photoproduction on the nucleon is presented. In this model, t-channel vector meson exchanges are described in terms of Regge trajectories to comply with the correct high energy behavior. We compare this reggeized model with an isobar model (\eta-MAID), where the t-channel exchanges are described by \rho and \omega poles. Both models contain the same resonance contributions, and describe current \gamma p \to \eta p data up to E_\gamma^{lab} = 2 GeV quite well, but only the reggeized model can be successfully extended to higher energies. For the \gamma p \to \eta' p reaction, the reggeized model is found to be able to give a satisfactory description. For the differential cross section data from SAPHIR, we find that the observed linear forward rise in cos(theta) near E_\gamma^{lab} = 1.6 GeV can be well described by the interference of an S11 resonance and the Regge trajectory exchanges without any need for an additional P-wave resonance.

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