N->Delta Quadrupole Transition in the Constituent Quark Model
High Energy Physics - Phenomenology
2007-05-23 v1 Nuclear Theory
Abstract
Information on the intrinsic deformation of the proton can be obtained by studying the electromagnetic p-->Delta+ quadrupole transition. Recent experiments have shown that the electric quadrupole (E2) strength in gamma p --> Delta+ is about 10 times larger than predicted by the simple quark model using only one-body currents. Our analysis provides evidence for the dominance of exchange currents in the N-->Delta quadrupole transition and identifies the physical mechanism leading to the observed E2 strength.
Keywords
Cite
@article{arxiv.hep-ph/9909385,
title = {N->Delta Quadrupole Transition in the Constituent Quark Model},
author = {A. J. Buchmann},
journal= {arXiv preprint arXiv:hep-ph/9909385},
year = {2007}
}
Comments
12 pages, published in the Proceedings of the 8th International Conference on the Structure of Baryons, Bonn, Germany, Sept. 22-26, 1998, Baryons' 98, eds. D. W. Menze and B. Ch. Metsch, World Scientific, Singapore, 1999, pg. 731