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We present a study of the dynamics in B0 --> K+ K- K0S decays
with approximately 230 million BBbar events collected by the BABAR
detector at SLAC. We find that the Dalitz plot distribution is best
parameterized with the phi K0S mode, an S-wave K+ K- resonance near
1500 MeV/c^2, and a large non-resonant contribution. We set limits on
resonances not included in our model, and study models for the
non-resonant contribution.
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