Electromagnetic nucleon-delta transition in the perturbative chiral quark model
High Energy Physics - Phenomenology
2009-11-10 v2
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.
Cite
@article{arxiv.hep-ph/0304033,
title = {Electromagnetic nucleon-delta transition in the perturbative chiral quark model},
author = {K. Pumsa-ard and V. E. Lyubovitskij and Th. Gutsche and Amand Faessler and S. Cheedket},
journal= {arXiv preprint arXiv:hep-ph/0304033},
year = {2009}
}
Comments
25 pages