kappa K+pi(-) vertex in light cone QCD sum rules

Baytemir G., SARAÇ OYMAK Y., YILMAZ O.

PHYSICAL REVIEW D, vol.81, no.9, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 81 Issue: 9
  • Publication Date: 2010
  • Doi Number: 10.1103/physrevd.81.094009
  • Journal Name: PHYSICAL REVIEW D
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Middle East Technical University Affiliated: Yes

Abstract

In this work we study the kappa K+pi(-) vertex in the framework of light cone QCD sum rules. We predict the coupling constant g kappa K+pi(-) to be g kappa K+pi(-) = (6.0 +/- 1.0) GeV and estimate the scalar f(0) - sigma mixing angle from the experimental ratio g(2)(kappa -> K pi)/g(2)(sigma -> pi pi).