Finite-Energy Sum Rules in Eta Photoproduction off the Nucleon
  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. 
JPAC Collaboration: J. Nys, V. Mathieu, C. Fern\'andez-Ram\'irez, A.   N. Hiller Blin, A. Jackura, M. Mikhasenko, A. Pilloni...
hep-ph