N* Resonances in e+e- Collisions at Bepc
摘要
particles are abundantly produced at the Beijing Electron Positron Collider (BEPC). The decays provide an excellent place for studying resonances. For and , the and systems are limited to be pure isospin 1/2 due to isospin conservation. This is a big advantage in studying resonances from decays, compared with and experiments which suffer difficulty on the isospin decomposition of 1/2 and 3/2. All other decay channels which are presently under investigation at CEBAF(JLab, USA), ELSA(Bonn,Germany) and GRAAL(Grenoble, France) with real photon or space-like virtual photon can also be studied at BEPC complementally with the time-like virtual photon. The process or provides a new way to probe the internal structure of the resonances. The recent results and outlook of our new program at BEPC are presented.
引用
@article{arxiv.hep-ph/0004220,
title = {N* Resonances in e+e- Collisions at Bepc},
author = {B. S. Zou and H. B. Li and representing BES Collaboration},
journal= {arXiv preprint arXiv:hep-ph/0004220},
year = {2007}
}
备注
Postscript file, 8 pages. Talk given at the International Workshop on the Physics of Excited Nucleons (NSTAR2000), Jefferson Lab, Virginia, USA, February 2000