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Title: Double and single pion photoproduction within a dynamical coupled-channels model

Within a dynamical coupled-channels model which has already been fixed from analyzing the data of the πN → πN and γN → πN reactions, we present the predicted double pion photoproduction cross sections up to the second resonance region, W < 1.7 GeV. The roles played by the different mechanisms within our model in determining both the single and double pion photoproduction reactions are analyzed, focusing on the effects due to the direct γN → ππN mechanism, the interplay between the resonant and non-resonant amplitudes, and the coupled-channels effects. As a result, the model parameters which can be determined most effectively in the combined studies of both the single and double pion photoproduction data are identified for future studies.
Authors:
;  [1] ;  [2] ;  [3] ;  [4]
  1. Universitat de Barcelona, Barcelona (Spain); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Shizuoka Univ., Shizuoka (Japan); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  4. Osaka Univ., Osaka (Japan); Univ. de Barcelona, Barcelona (Spain)
Publication Date:
OSTI Identifier:
1029200
Report Number(s):
JLAB-THY--09-1064; DOE/OR/23177--0971; arXiv:0909.1129
Journal ID: ISSN 0556-2813; PRVCAN; TRN: US1105667
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 80; Journal Issue: 6; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; CROSS SECTIONS; FOCUSING; PHOTOPRODUCTION; PIONS; PRODUCTION; RESONANCE