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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
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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.

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K. Pumsa-ard, V. E. Lyubovitskij, Th. Gutsche, Amand Faessler, S. Cheedket. 2003-06-03. Electromagnetic nucleon-delta transition in the perturbative chiral quark model. https://doi.org/10.1103/physrevc.68.015205

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