Effect of gluon-exchange pair currents on the ratio μpGpE/GpM
Abstract
The effect of one-gluon-exchange (OGE) pair currents on the ratio μpGpE/GpM for the proton is investigated within a nonrelativistic constituent quark model starting from SU(6)×O(3) nucleon wave functions, but with relativistic corrections. We found that the OGE pair currents are important to reproduce well the ratio μpGpE/GpM. With the assumption that the gluonic currents are the driving mechanism for the violation of the scaling law, we predict the neutron ratio μnGnE/GnM.
- Publication:
-
Physical Review C
- Pub Date:
- April 2003
- DOI:
- 10.1103/PhysRevC.67.042201
- arXiv:
- arXiv:nucl-th/0302037
- Bibcode:
- 2003PhRvC..67d2201K
- Keywords:
-
- 13.40.Gp;
- 12.39.Jh;
- Electromagnetic form factors;
- Nonrelativistic quark model;
- Nuclear Theory
- E-Print:
- 5 pages, 4 figures