Finite-energy sum rules in eta photoproduction off a nucleon
Physical review. D/Physical review. D.2017Vol. 95(3)
Citations Over TimeTop 10% of 2017 papers
Jannes Nys, V. Mathieu, C. Fernández-Ramírez, A. N. Hiller Blin, Andrew W. Jackura, M. Mikhasenko, A. Pilloni, Adam P. Szczepaniak, Geoffrey Fox, J. Ryckebusch
Abstract
The reaction $\ensuremath{\gamma}N\ensuremath{\rightarrow}\ensuremath{\eta}N$ is studied in the high-energy regime (with photon lab energies ${E}_{\ensuremath{\gamma}}^{\mathrm{lab}}>4\text{ }\text{ }\mathrm{GeV}$) using information from the resonance region through the use of finite-energy sum rules. 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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