ELECTROMAGNETIC N-DELTA TRANSITION FORM-FACTORS IN A LIGHT-FRONT CONSTITUENT QUARK-MODEL

A parameter-free evaluation of the N-Delta electromagnetic transition form factors is carried out in a light-front constituent quark model, based on N and Delta eigenstates of a mass operator which reproduces a large set of hadron energy levels, A one-body electromagnetic current , including the constituent quark form factors previously determined w ithin the same approach from nucleon and pion experimental data, is us ed. Our prediction for the magnetic transition form factor is compared with the results both of phenomenological analyses of experimental da ta for the Delta electroproduction, and of an analysis which includes the effects of off-energy-shell pi-N anal state interaction.