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Configuration mixings and light-front relativistic quark model predictions for the electroexcitation of the Delta(1232)3/2+, N(1440)1/2+, and Delta(1600)3/2+

We investigate the impact of the configurations mixings that follow from QCD-inspired interquark forces on our results for the electroexcitation of the Delta(1232)3/2+, N(1440)1/2+, and Delta(1600)3/2+ obtained earlier in the light-front relativistic quark model. We have shown that the configurations mixings increase the 3q contribution to the gamma* N -> Delta(1232)3/2+ magnetic-dipole form factor at Q2=0 from 42% to 63% and significantly improve the agreement with experiment for the gamma* p -> N(1440)1/2+ transverse helicity amplitude at Q2 > 1.5GeV2. For the gamma* N -> Delta(1600)3/2+ transition, configuration mixings change strongly the results obtained earlier for the N and Delta(1600)3/2+ taken as pure states in the multiplets [56,0+] and [56',0+].