Search for the W-exchange decays B0 --> Ds(*)- Ds(*)+

The BABAR Collaboration, B. Aubert

We report a search for the decays $B^0\to D_s^{-}{D}_s^{+}$, $B^0\to D_s^{\ast -}{D}_s^{+}$, $B^0\to D_s^{\ast -}{D}_s^{\ast +}$ in a sample of 232 million ${\rm Y}(4S)$ decays to…