The same arguments as before allow to show the existence
of a single form factor for each 
or 
transition.
Specializing to the 
case, one has
where 
is normalized to coincide with the VP-coupling
constant to real photons governing the well-known 
radiative decay rates.
The transition form factor for the 
case has the same characteristics with V replaced by 
and
. The normalization is now given by the 
and
couplings to 
and generalization to the case
where both photons are off-mass-shell (
) is obvious.
In both cases, 
stands for the final spin-1
polarization and the 
factor appears
because only the pseudoscalar meson belongs to the abnormal spin-parity
series.
