Electroexcitation of the Delta(1232)3/2+ and Delta(1600)3/2+ in a light-front relativistic quark model

TL;DR

This paper predicts electromagnetic transition form factors and helicity amplitudes for Delta resonances using a light-front relativistic quark model, extending understanding of nucleon to Delta transitions at high photon virtualities.

Contribution

It introduces a light-front relativistic quark model to calculate transition form factors and helicity amplitudes for Delta resonances up to Q2=12 GeV2, including the first radial excitation.

Findings

Predicted magnetic-dipole form factor and ratios R_EM and R_SM for gamma* N -> Delta(1232) transition.

Calculated helicity amplitudes for gamma* N -> Delta(1600) assuming it as a radial excitation.

Extended the model's applicability to high Q2 regions.

Abstract

The magnetic-dipole form factor and the ratios R_EM and R_SM for the gamma* N -> Delta(1232)3/2}+ transition are predicted within light-front relativistic quark model up to photon virtuality Q2=12 GeV2. We also predict the helicity amplitudes of the gamma* N -> Delta(1600)3/2+ transition assuming the Delta(1600)3/2+ is the first radial excitation of the ground state Delta(1232)3/2+.