Diquarks: a QCD sum rule perspective
Nuclear Theory
2011-09-02 v2 High Energy Physics - Phenomenology
Abstract
We propose a phenomenological QCD sum rule with an explicit diquark field to investigate the essential ingredients inside the hadrons. Introducing the mass (m_\phi) and the condensate (\phi^2) for the diquark field as parameters in the model, we find that the sum rule works well for Lambda, Lambda_c and Lambda_b. This implies that these Lambda baryons can be represented by a diquark and a quark configuration. We also find that there is a duality relation among the parameters (m_\phi, \phi^2), for which the sum rule is equally good. In the limit when \phi^2 =0 we find m_\phi=0.4 GeV, which can be thought as the constituent diquark mass.
Cite
@article{arxiv.1103.0826,
title = {Diquarks: a QCD sum rule perspective},
author = {Kyungil Kim and Daisuke Jido and Su Houng Lee},
journal= {arXiv preprint arXiv:1103.0826},
year = {2011}
}
Comments
4 pages, 4 figures, revised version published in Phys. Rev. C