Gérard, Jean-Marc
[UCL]
Lahna, T.
(eng)
The Bjorken-Johnson-Low theorem applied to the $\gamma^\ast \to \gamma^\ast
\pi^0$ process provides us with a rather remarkable asymptotic behaviour for
the $\pi^0 \gamma^\ast \gamma^\ast$ vertex. We compare our result with previous
QCD- inspired estimates and argue that the predicted behaviour is quite
consistent with the present data on hadronic $J/\Psi$ decays and ensures the
matching of long- and short-distance radiative corrections to $\pi^+ \to e^+
\nu_e$.
Comment: 10 pages, latex, no figures
Bibliographic reference |
Gérard, Jean-Marc ; Lahna, T.. The Asymptotic behavior of the pi0 gamma* gamma* vertex. In: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. B356, p. 381-385 (1995) |
Permanent URL |
http://hdl.handle.net/2078/31569 |