Isospin decomposition of γNN* transitions within a dynamical coupled-channels model

H. Kamano, S. X. Nakamura, T.-S. H. Lee, and T. Sato
Phys. Rev. C 94, 015201 – Published 7 July 2016
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Abstract

By extending the dynamical coupled-channels analysis performed in our previous work [Phys. Rev. C 88, 035209 (2013)] to include the available data of photoproduction of π mesons off neutrons, the transition amplitudes for the photoexcitation of the neutron-to-nucleon resonances, γnN*, at the resonance pole positions are determined. The combined fits to the data for both the proton- and neutron-target reactions also revise our results for the resonance pole positions and the γpN* transition amplitudes. Our results allow an isospin decomposition of the γNN* transition amplitudes for the isospin I=12N* resonances, which is necessary for testing hadron structure models and gives crucial inputs for constructing models of neutrino-induced reactions in the nucleon resonance region.

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  • Received 2 May 2016

DOI:https://doi.org/10.1103/PhysRevC.94.015201

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear PhysicsParticles & Fields

Authors & Affiliations

H. Kamano1,2,*, S. X. Nakamura3, T.-S. H. Lee4, and T. Sato3

  • 1KEK Theory Center, Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
  • 2J-PARC Branch, KEK Theory Center, IPNS, KEK, Tokai, Ibaraki 319-1106, Japan
  • 3Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
  • 4Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

  • *kamano@post.kek.jp

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Issue

Vol. 94, Iss. 1 — July 2016

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