Suppression of πNN(1535) Coupling in the QCD Sum Rule(Recent Developments in QCD and Hadron Physics)

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概要

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• The πNN^* and ηNN^* coupling constants are studied in the QCD sum rule (N^*≡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 g_<πNN^*> vanishes to this order, while g_<ηNN^*> has a finite contribution. The vanishing of g_<πNN^*> is a rigorous consequence in the chiral limit. The results of the QCD sum rule are compared with those of low energy effective models.

• 素粒子論グループ 素粒子研究編集部の論文
• 1997-07-20

著者

• Jido D.

  Department Of Physics Tokyo Institute Of Technology

• Hosaka A

  Res. Center For Nuclear Physics (rcnp) Osaka Jpn

• Hosaka A.

  Numazu College of Technology

• Oka M.

  Department of Physics, Tokyo Institute of Technology

関連論文

• Suppression of πNN(1535) Coupling in the QCD Sum Rule(Recent Developments in QCD and Hadron Physics)
• Present status of η-η′ mixing angle (Proceedings of the 1996 YITP Workshop:Recent Developments in QCD and Hadron Physics)

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