Hadronic Coupling Constants in Lattice QCD

Details Hadronic Coupling Constants in Lattice QCD Hadronic Coupling Constants in Lattice QCD

1995-04-07

arxiv.org/abs/hep-lat/9504003v1

Z.Phys. C68 (1995) 443-450

Physics

High Energy Physics

High Energy Physics - Lattice

14 pages uuencoded postscript file

Scientific paper

10.1007/BF01620719

We calculate the hadronic coupling constants $g_{NN\pi}$ and $g_{\rho\pi\pi}$ in QCD, including dynamical quarks in the framework of staggered fermions in the lattice approach. For the nucleon--pion coupling we obtain $g_{NN\pi} = 13.8 \pm 5.8$, to be compared with the experimental value $13.13 \pm 0.07$. The $\rho\pi\pi$ coupling has been analysed for two different sets of operators with the averaged result $g_{\rho\pi\pi} = 4.2 \pm 1.9$ which is to be compared with the experimental value $6.06 \pm 0.01$.

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