Finite-energy sum rules in eta photoproduction off a nucleon

J. Nys, V. Mathieu, C. Fernández-Ramírez, A. N. Hiller Blin, A. Jackura, M. Mikhasenko, A. Pilloni, A. P. Szczepaniak, G. Fox, and J. Ryckebusch (Joint Physics Analysis Center)

Phys. Rev. D 95, 034014 – Published 15 February 2017

Abstract

The reaction $γ N \to η N$ is studied in the high-energy regime (with photon lab energies $E_{γ}^{lab} > 4 GeV$ ) 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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Received 17 November 2016

DOI:https://doi.org/10.1103/PhysRevD.95.034014

Physics Subject Headings (PhySH)

Particle interactions Photon & charged-lepton interactions with hadrons Resonance reactions

Nuclear PhysicsParticles & Fields

Authors & Affiliations

J. Nys^1,*, V. Mathieu^2,3, C. Fernández-Ramírez⁴, A. N. Hiller Blin^5,2, A. Jackura^2,3, M. Mikhasenko⁶, A. Pilloni⁷, A. P. Szczepaniak^2,3,7, G. Fox⁸, and J. Ryckebusch¹ (Joint Physics Analysis Center)

¹Department of Physics and Astronomy, Ghent University, B-9000 Ghent, Belgium
²Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47403, USA
³Physics Department, Indiana University, Bloomington, Indiana 47405, USA
⁴Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
⁵Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, E-46071 Valencia, Spain
⁶Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany
⁷Theory Center, Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
⁸School of Informatics and Computing, Indiana University, Bloomington, Indiana 47405, USA

^*Jannes.Nys@UGent.be

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Issue

Vol. 95, Iss. 3 — 1 February 2017

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