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20 April 2024

» arxiv » hep-ph/0304033

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Electromagnetic nucleon-delta transition in the perturbative chiral quark model
K. Pumsa-ard ; V.E. Lyubovitskij ; Th. Gutsche ; Amand Faessler ; S. Cheedket ;
Date:	3 Apr 2003
Journal:	Phys.Rev. C68 (2003) 015205
Subject:	hep-ph
Affiliation:	Tuebingen U.
Abstract:	We apply the perturbative chiral quark model to the gamma N -> Delta transition. The four momentum dependence of the respective transverse helicity amplitudes A(1/2) and A(3/2) is determined at one loop in the pseudoscalar Goldstone boson fluctuations. Inclusion of excited states in the quark propagator is shown to result in a reasonable description of the experimental values for the helicity amplitudes at the real photon point.
Source:	arXiv, hep-ph/0304033
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