Baryon Current Matrix Elements in a Relativistic Quark Model
核理论
2007-05-23 v1
摘要
Current matrix elements and observables for electro- and photo-excitation of baryons from the nucleon are studied in a light-front framework. Relativistic effects are examined by comparison to a nonrelativistic model and can typically be of order 20-25%, but can be larger for certain matrix elements, such as radial transitions conventionally used to describe the Roper resonance. A systematic study shows that the violation of rotational covariance of the baryon transition matrix elements stemming from the use of one-body currents is generally small.
引用
@article{arxiv.nucl-th/9701007,
title = {Baryon Current Matrix Elements in a Relativistic Quark Model},
author = {Simon Capstick and B. D. Keister},
journal= {arXiv preprint arXiv:nucl-th/9701007},
year = {2007}
}
备注
13 pages, LaTeX, 5 postscript figures, Invited talk at `CEBAF/INT Workshop on N* Physics', Seattle, WA September 8-13, 1996