Advertisement

A relativistic study of the nucleon helicity amplitudes

  • M. De Sanctis
  • E. Santopinto
  • M.M. Giannini
Hadron physics

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 Q2≃ 2 (GeV/c)2. However, the low Q2-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.

PACS:12.39.Ki Relativistic quark model – 13.40.Gp Electromagnetic form factors – 14.20.Gk Baryon resonances with S=0 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • M. De Sanctis
    • 1
  • E. Santopinto
    • 2
  • M.M. Giannini
    • 2
  1. 1.INFN, Sezione di Roma, P.le A.Moro 2, I-00185 Roma, ItalyIT
  2. 2.Dipartimento di Fisica dell'Università di Genova, I.N.F.N., Sezione di Genova, via Dodecaneso 33, 16164 Genova, Italy (e-mail:giannini@genova.infn.it)IT

Personalised recommendations