Quark Model Predictions for Electroproduction of Isobars

摘要

The excited quark model and the additive quark model constraints on the angular decay distributions of B^* produced by virtual photons in the process gamma _virt o PB^* are obtained. Some of the quark model relations are compared with the experimental data to check the quark model, others are used to obtain for Delta ⁺⁺ the ratio of the cross-sections for production by longitudinal and transverse photons on protons R = sigma _L/sigma _T. The agreement of the quark model predictions with experiment is found to be good.