Magnetization screening from gluonic currents and scaling-law violation in the ratio of magnetic form factors for neutron and proton
- 24 February 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 69 (2) , 028201
- https://doi.org/10.1103/physrevc.69.028201
Abstract
Gluon exchange currents can explain the decrease of the ratio μpGEp∕GMp for four-momentum transfer beyond Q2∼1GeV2. The SU(6) breaking induced by gluonic currents predicts furthermore that the ratio of neutron to proton magnetic form factors μpGMn∕μnGMp falls with increasing Q2. We find that the experimental data are consistent with our expectations of an almost linear decrease of the ratio μpGMn∕μnGMp with increasing Q2.Keywords
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