  We calculate the cross sections and final state distributions for the
processes e^+ e^- --> Upsilon(1S) (pi^+ pi^-, K^+ K^-, eta pi^0) near the
Upsilon(5S) resonance based on the tetraquark hypothesis. This framework is
used to analyse the data on the Upsilon(1S) pi^+ pi^- and Upsilon(1S) K^+ K^-
final states [K.F. Chen et al. (Belle Collaboration), Phys. Rev. Lett. 100,
112001 (2008); I. Adachi et al. (Belle Collaboration), arXiv:0808.2445],
yielding good fits. Dimeson invariant mass spectra in these processes are shown
to be dominated by the corresponding light scalar and tensor states. The
resulting correlations among the cross sections are worked out. We also predict
sigma(e^+ e^- --> Upsilon(1S) K^+ K^-)/sigma(e^+ e^- --> Upsilon(1S) K^0
Kbar^0) = 1/4. These features provide crucial tests of the tetraquark framework
and can be searched for in the currently available and forthcoming data from
the B factories.
