E2/M1ratio of theΔ↔γNtransition within the chiral constituent quark model

• DOI: 10.1103/physrevc.55.2024
• Publication Date: 2002-07-26T20:48:47Z
• Authors: Peng-Nian Shen; Yu-Bin Dong; Zong-Ye Zhang; You-Wen Yu; T.-S. H. Lee
• Keywords: 0103 physical sciences; 01 natural sciences

The chiral constituent quark model is applied to predict the magnetic $M1$ and electric $E2$ amplitudes of $\ensuremath{\Delta}\ensuremath{\leftrightarrow}\ensuremath{\gamma}N$ transition. It found that one-meson-exchange quark-quark potential due fields enhances $E2/M1$ ratio by a factor about 2. predicted ${M}_{{1}^{+}}$ amplitude $\ensuremath{\simeq}\ensuremath{-}1.0%$ are within range determined from recent analysis data pion photoproduction.