Strong coupling constant of a negative parity nucleon with a pi meson in light-cone QCD sum rules
PHYSICAL REVIEW C, vol.95, no.3, 2017 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 95 Issue: 3
- Publication Date: 2017
- Doi Number: 10.1103/physrevc.95.035210
- Journal Name: PHYSICAL REVIEW C
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Open Archive Collection: AVESIS Open Access Collection
- Middle East Technical University Affiliated: Yes
Abstract
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.