The F/D Ratio and Meson-Baryon Couplings from QCD Sum Rules
High Energy Physics - Phenomenology
2009-11-07 v1 Nuclear Theory
Abstract
Coupling constants of the pseudoscalar mesons to the octet baryons are computed in the QCD sum rule approach. The pi-NN, eta-NN, pi-XiXi, eta-XiXi, pi-SigmaSigma, eta-SigmaSigma as well as pi-Lambda-Sigma couplings are studied. Determining the pertinent Dirac structure in the correlation function, we analyze the couplings in the SU(3) limit. We find the F/D ratio to be \sim 0.6-0.8 that is consistent with the SU(6) value. We also estimate the SU(3) breaking effect using a projected correlation function method.
Cite
@article{arxiv.hep-ph/0212043,
title = {The F/D Ratio and Meson-Baryon Couplings from QCD Sum Rules},
author = {Takumi Doi and Hungchong Kim and Yoshihiko Kondo and Makoto Oka},
journal= {arXiv preprint arXiv:hep-ph/0212043},
year = {2009}
}
Comments
4 pages, Talk given at XVI International Conference on Particles and Nuclei (PANIC02), Osaka, Japan, Sep.30 - Oct.4, 2002