E2 M1 RATIO OF THE DELTA[--]GAMMA-N TRANSITION WITHIN THE CHIRAL CONSTITUENT QUARK-MODEL/

Authors
SHEN PN DONG YB ZHANG ZY YU YW LEE TSH
Citation
Pn. Shen et al., E2 M1 RATIO OF THE DELTA[--]GAMMA-N TRANSITION WITHIN THE CHIRAL CONSTITUENT QUARK-MODEL/, Physical review. C. Nuclear physics, 55(4), 1997, pp. 2024-2029
Citations number
24
Categorie Soggetti
Physics, Nuclear
Journal title
Physical review. C. Nuclear physics → ACNP
ISSN journal
05562813
Volume
55
Issue
4
Year of publication
1997
Pages
2024 - 2029
Database
ISI
SICI code
0556-2813(1997)55:4<2024:EMROTD>2.0.ZU;2-U
Abstract
The chiral constituent quark model is applied to predict the magnetic M1 and electric E2 amplitudes of the Delta<->gamma N transition. It is found that the one-meson-exchange quark-quark potential due to the ch iral fields enhances the E2/M1 ratio by a factor of about 2. The predi cted M1+ amplitude and the E2/M1 ratio similar or equal to-1.0% are wi thin the range determined from a recent analysis of the data of pion p hotoproduction.