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A reggeized model for eta and eta-prime photoproduction

Wen-Tai Chiang·Shin Nan Yang·L. Tiator·M. Vanderhaeghen·D. Drechsel
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Abstract

A reggeized model for ηand η' 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 (η-MAID), where the t-channel exchanges are described by ρand ωpoles. Both models contain the same resonance contributions, and describe current γp \to ηp data up to E_γ^{lab} = 2 GeV quite well, but only the reggeized model can be successfully extended to higher energies. For the γp \to η' 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_γ^{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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Wen-Tai Chiang, Shin Nan Yang, L. Tiator, M. Vanderhaeghen, D. Drechsel. 2003-08-29. A reggeized model for eta and eta-prime photoproduction. https://doi.org/10.1103/physrevc.68.045202

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