Abstact:
We perform a calculation of the relativistic transition form factors for the electromagnetic excitation of the nucleon resonances. We use as input the 3-quark wave functions obtained in a Constituent Quark Model with three-body forces in the hypercentral approach. With respect to the non relativistic calculations a significant contribution is obtained up to Q 2≃ 2 (GeV/c)2. However, the low Q 2-behaviour exhibits a lack of strength, which may be connected with the need of taking into account explicitly further degrees of freedom beyond the three constituent quark ones.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 16 April 1998
Rights and permissions
About this article
Cite this article
De Sanctis, M., Santopinto, E. & Giannini, M. A relativistic study of the nucleon helicity amplitudes . EPJ A 2, 403–409 (1998). https://doi.org/10.1007/s100500050137
Issue Date:
DOI: https://doi.org/10.1007/s100500050137