A phenomenological model with N(1535) dominance and rho-exchange excitation reproduces existing pp to pp eta data and predicts cross sections for HADES, PANDA, and SIS100.
Finite-Energy Sum Rules in Eta Photoproduction off the Nucleon
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abstract
The reaction ${\gamma}N \to {\eta}N$ is studied in the high-energy regime (with photon lab energies $E_{\gamma}^{\textrm{lab}} > 4$ GeV) using information from the resonance region through the use of finite-energy sum rules (FESR). We illustrate how analyticity allows one to map the t-dependence of the unknown Regge residue functions. We provide predictions for the energy dependence of the beam asymmetry at high energies.
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Exclusive $\eta$ production in proton-proton collisions at energies available at the GSI Facility for Antiproton and Ion Research
A phenomenological model with N(1535) dominance and rho-exchange excitation reproduces existing pp to pp eta data and predicts cross sections for HADES, PANDA, and SIS100.