Electromagnetic transitions of excited baryons in a deformed oscillator quark model
Abstract
We study electromagnetic transitions of excited baryons in a deformed oscillator quark model, where baryon excited states are described as rotational bands of deformed intrinsic states. We describe all necessary tools to compute transition amplitudes in multipole basis, which are then related to the commonly used helicity amplitudes. We pay a special attention on the sign of the amplitudes as well as their absolute values by computing the photon and pion couplings simultaneously. We have found that the effect of deformation on the transition amplitudes is rather weak. The difficulty in reproducing the empirical amplitude of the Roper state is discussed.
Keywords
Cite
@article{arxiv.hep-ph/9910469,
title = {Electromagnetic transitions of excited baryons in a deformed oscillator quark model},
author = {Atsushi Hosaka and Miho Takayama and Hiroshi Toki},
journal= {arXiv preprint arXiv:hep-ph/9910469},
year = {2009}
}
Comments
29 pages, 3 figures, LaTeX2e, epsf.sty and AMSLaTeX package are required; typos corrected, published version