Flavor SU(4) breaking between effective couplings
Nuclear Theory
2015-06-03 v1 High Energy Physics - Experiment
High Energy Physics - Lattice
High Energy Physics - Phenomenology
Nuclear Experiment
Abstract
Using a framework in which all elements are constrained by Dyson-Schwinger equation studies in QCD, and therefore incorporates a consistent, direct and simultaneous description of light- and heavy-quarks and the states they constitute, we analyze the accuracy of SU(4)-flavor symmetry relations between {\pi}{\rho}{\pi}, K{\rho}K and D{\rho}D couplings. Such relations are widely used in phenomenological analyses of the interactions between matter and charmed mesons. We find that whilst SU(3)-flavor symmetry is accurate to 20%, SU(4) relations underestimate the D{\rho}D coupling by a factor of five.
Keywords
Cite
@article{arxiv.1111.3647,
title = {Flavor SU(4) breaking between effective couplings},
author = {Bruno El-Bennich and Gastão Krein and Lei Chang and Craig D. Roberts and David J. Wilson},
journal= {arXiv preprint arXiv:1111.3647},
year = {2015}
}
Comments
5 pages, two figures