Strong coupling constant of a negative parity nucleon with a pi meson in light-cone QCD sum rules

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ALIYEV T., Barakat T., SAVCI M.

PHYSICAL REVIEW C, cilt.95, sa.3, 2017 (SCI-Expanded, Scopus)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 95 Sayı: 3
• Basım Tarihi: 2017
• Doi Numarası: 10.1103/physrevc.95.035210
• Dergi Adı: PHYSICAL REVIEW C
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
• Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

We estimate the strong coupling constant between the negative parity nucleons with pi meson within the lightcone QCD sum rules. A method for eliminating the unwanted contributions coming from the nucleon-nucleon and nucleon-negative parity nucleon transition is presented. It is observed that the value of the strong coupling constant of the negative parity nucleon N* N* pi transition is smaller by about 50% compared to the coupling constant of the positive parity NN pi transition.