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Particles and Fields


Eur. Phys. J. C 22, 323-326 (2001)
DOI: 10.1007/s100520100801

Coupling constants $g_{a_0\omega\gamma}$ and $g_{a_0\rho\gamma}$ as derived from QCD sum rules

A. Gokalp and O. Yilmaz

Physics Department, Middle East Technical University, 06531 Ankara, Turkey

(Received: 5 July 2001 / Published online: 12 November 2001 - © Springer-Verlag / Società Italiana di Fisica 2001 )

Abstract
We consider the two point correlation function of a scalar current in the QCD sum rule approach to estimate the overlap amplitude of the a0-meson. We then employ QCD sum rules to calculate the coupling constants $g_{\omega a_0\gamma}$ and $g_{\rho a_0\gamma}$ by studying the three point ${a_0\omega\gamma}$- and ${a_0\rho\gamma}$-correlation functions.



© Società Italiana di Fisica, Springer-Verlag 2001