Electroexcitation of the P-33(1232), P-11(1440), D-13(1520), and S-11(1535) at Q(2)=0.4 and 0.65 (GeV/c)(2)

Using two approaches-dispersion relations and the isobar model-we have analyzed recent high precision CLAS data on cross sections of pi(0), pi(+), and eta electroproduction on protons, and the longitudinally polarized electron beam asymmetry for p(e(-->),e'p)pi(0) and p(e(-->),e'n)pi(+). The contributions of the resonances P-33(1232), P-11(1440), D-13(1520), and S-11(1535) to pi electroproduction and of S-11(1535) to eta electroproduction are found. The results obtained using the two approaches are in good agreement. There is also good agreement between amplitudes of the gamma*N-->S-11(1535) transition found in pi and eta electroproduction. For the first time accurate results are obtained for the longitudinal amplitudes of the P-11(1440), D-13(1520), and S-11(1535) electroexcitations on protons. A strong longitudinal response is found for the Roper resonance, which rules out presentation of this resonance as a hybrid state.