E2/M1 ratio of the ΔγN transition within the chiral constituent quark model

Phys. Rev. C 55, 2024 – Published 1 April 1997
Peng-Nian Shen, Yu-Bin Dong, Zong-Ye Zhang, You-Wen Yu, and T.-S. H. Lee

Abstract

The chiral constituent quark model is applied to predict the magnetic M1 and electric E2 amplitudes of the ΔγN transition. It is found that the one-meson-exchange quark-quark potential due to the chiral fields enhances the E2/M1 ratio by a factor of about 2. The predicted M1+ amplitude and the E2/M1 ratio -1.0% are within the range determined from a recent analysis of the data of pion photoproduction.

DOI: http://dx.doi.org/10.1103/PhysRevC.55.2024

  • Received 12 December 1996
  • Published in the issue dated April 1997

© 1997 The American Physical Society

Authors & Affiliations

Peng-Nian Shen1,2,3, Yu-Bin Dong1,2, Zong-Ye Zhang1, You-Wen Yu1, and T.-S. H. Lee4

  • 1Institute of High Energy Physics, Academia Sinica, Beijing 100039, China
  • 2China Center of Advanced Science and Technology (World Laboratory), Beijing 100080, China
  • 3Institute of Theoretical Physics, Academia Sinica, Beijing 100080, China
  • 4Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843

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