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, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

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.