DOI: 10.1140/epjc/s2002-01066-5
decay into two photons
N. Fabiano Perugia University and INFN, via Pascoli, 06100 Perugia, Italy
(Received: 28 July 2002 / Revised version: 16 September 2002 / Published online: 20 November 2002 )
Abstract
We discuss the theoretical predictions for the two photon decay
width of the
pseudoscalar
meson. Predictions from potential models
are examined.
It is found that various models are in good agreement with each
other.
Results for
are also compared with those from
data
through the NRQCD procedure.
© Società Italiana di Fisica, Springer-Verlag 2003