On the strong coupling N(*)N(*)pi


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Azizi K., Sarac Y., Sundu H.

EUROPEAN PHYSICAL JOURNAL A, vol.52, no.4, pp.1-9, 2016 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 52 Issue: 4
  • Publication Date: 2016
  • Doi Number: 10.1140/epja/i2016-16114-2
  • Title of Journal : EUROPEAN PHYSICAL JOURNAL A
  • Page Numbers: pp.1-9

Abstract

We study the strong vertices N*N pi, N*N*pi and NN pi in QCD, where N* denotes the negative-parity N(1535) state. We use the most general form of the interpolating currents to calculate the corresponding strong coupling constants. It is obtained that the coupling associated to N*N pi vertex is strongly suppressed compared to those related to two other vertices. The strong coupling corresponding to N*N*pi is obtained to be roughly half of that of NN pi vertex. We compare the obtained results on N*N pi and NN pi vertices with the existing predictions of other theoretical studies as well as those extracted from the experimental data.