Electromagnetic properties of diquarks
Abstract
Diquark correlations play an important role in hadron physics. The properties of diquarks can be obtained from the corresponding bound state equation. Using a model for the effective quark-quark interaction that has proved successful in the light meson sector, we solve the scalar diquark Bethe-Salpeter equations and use the obtained Bethe-Salpeter amplitudes to compute the diquarks' electromagnetic form factors. The scalar ud diquark charge radius is about 8% larger than the pion charge radius, indicating that these diquarks are somewhat larger in size than the corresponding mesons. We also provide analytic fits for the form factor over a moderate range in Q^2, which may be useful, for example, in building quark-diquark models of nucleons.
Keywords
Cite
@article{arxiv.nucl-th/0409008,
title = {Electromagnetic properties of diquarks},
author = {Pieter Maris},
journal= {arXiv preprint arXiv:nucl-th/0409008},
year = {2015}
}
Comments
11 pages, 3 .eps figures, minor corrections in table and figure, no change in conclusions