The form factors of γ * N → Δ ( 1600 ) transition is calculated within the light-cone sum rules assuming that Δ + ( 1600 ) is the first radial excitation of Δ ( 1232 ) . The Q 2 dependence of the magnetic dipole G ? M ( Q 2 ) , electric quadrupole G ? E ( Q 2 ) , and Coulomb quadrupole G ? c ( Q 2 ) form factors are investigated. Moreover, the Q 2 dependence of the ratios R EM = ? G ? E ( Q 2 ) G ? M ( Q 2 ) and R SM = ? 1 4 m Δ ( 1600 ) 2 4 m Δ ( 1600 ) 2 Q 2 + ( m Δ ( 1600 ) 2 ? Q 2 ? m N 2 ) 2 G ? c ( Q 2 ) G ? M ( Q 2 ) are studied. Finally, our predictions on G ? M ( Q 2 ) , G ? E ( Q 2 ) , and G ? C ( Q 2 ) are compared with the results of other theoretical approaches.
展开▼
