  We describe a four-parameter model for non-exotic meson-meson scattering,
which accommodates all non-exotic mesons, hence also the light scalar mesons,
as resonances and bound states characterised by complex singularities of the
scattering amplitude as a function of the total invariant mass. The majority of
the full $S$-matrix mesonic poles stem from an underlying confinement spectrum.
However, the light scalar mesons K0*(830), a0(980), f0(400-1200), and f0(980)
do not, but instead originate in 3P0-barrier semi-bound states.
  In the case of bound states, wave functions can be determined. For ccbar and
bbbar, radiative transitions have been calculated. Here we compare the results
to the data.
