Electromagnetic nucleon-delta transition in the perturbative chiral quark model

Details Electromagnetic nucleon-delta transition in the perturbative chiral quark model Electromagnetic nucleon-delta transition in the perturbative chiral quark model

2003-04-03

arxiv.org/abs/hep-ph/0304033v2

Phys.Rev. C68 (2003) 015205

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages

Scientific paper

10.1103/PhysRevC.68.015205

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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