The
and
couplings in QCD
Shi-Lin Zhu
Institute of Theoretical Physics, Academia Sinica, P.O.BOX 2735, Beijing 100080, P.R.China
Received: 31 July 1998 / Revised version: 20 November 1998 Communicated by W. Weise
Abstract
The light cone QCD sum rules are derived for the coupling
and the
coupling
. The contribution from the excited
states and the continuum is subtracted cleanly through the double Borel transform with respect
to the two external momenta, p12, p22=(p-q)2. Our result
and
is in good agreement with the experimental value.
PACS
13.75.Lb Meson-meson interactions -
14.40.-n Mesons -
13.25.-k Hadronic decays of mesons -
12.38.Lg Nonperturbative methods
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