Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-02-10
Physics
High Energy Physics
High Energy Physics - Phenomenology
6pp, LaTeX, Talk given by A.H. at YITP workshop ''Recent developments in QCD and hadron physics", Kyoto, December (1996), to a
Scientific paper
The \pi NN^* and \eta NN^* coupling constants are studied in the QCD sum rule ($N^* \equiv N(1535)). We investigate the two point functions between the vacuum and a one meson state in the soft meson limit. The operator product expansion is explicitly performed up to terms of dimension eight. We find that \gpNR vanishes to this order, while \geNR has a finite contribution. The vanishing of \gpNR is a rigorous consequence in the chiral limit. The results of the QCD sum rule are compared with those of low energy effective models.
Hosaka Atsushi
Jido Daisuke
Oka Makoto
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