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Title: Photocouplings at the pole from pion photoproduction

The reactions γp → π0p and γp → π+n are analyzed in a semi-phenomenological approach up to E ~ 2.3 GeV. Fits to differential cross section and single and double polarization observables are performed. A good overall reproduction of the available photoproduction data is achieved. The Julich2012 dynamical coupled-channel model -which describes elastic πN scattering and the world data base of the reactions πN → ηN, KΛ, and KΣ at the same time– is employed as the hadronic interaction in the final state. Furthermore, the framework guarantees analyticity and, thus, allows for a reliable extraction of resonance parameters in terms of poles and residues. In particular, the photocouplings at the pole can be extracted and are presented.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [1] ;  [1] ;  [5] ;  [6]
  1. Forschungszentrum Julich, Julich (Germany)
  2. Univ. Bonn, Bonn (Germany); The George Washington Univ., Washington, D.C. (United States)
  3. Univ. of Chinese Academy of Sciences, Beijing (China); Univ. of Georgia, Athens, GA (United States)
  4. The George Washington Univ., Washington, D.C. (United States)
  5. Forschungszentrum Julich, Julich (Germany); Univ. Bonn, Bonn (Germany)
  6. Forschungszentrum Julich, Julich (Germany); Univ. of Georgia, Athens, GA (United States)
Publication Date:
OSTI Identifier:
1303564
Report Number(s):
JLAB-THY--14-2018; DOE/OR/23177--3899; arXiv:1401.0634
Journal ID: ISSN 1434-6001; PII: 92; JLAB-EXP-94-103; JLAB-EXP-03-105
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
European Physical Journal. A
Additional Journal Information:
Journal Volume: 50; Journal Issue: 6; Journal ID: ISSN 1434-6001
Publisher:
Springer
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS