A Search for the Rare Decay B0 --> DS+ rho-
The BABAR Collaboration, B. Aubert
Abstract
We report on a search for the decay B0 --> DS+ rho- in a sample of 90 million Y(4S) decays into B meson pairs collected between 1999 and 2001 with the BaBar detector at the PEP-II asymmetric-energy e+e- collider. No significant excess of signal events above the expected background is observed. We set a 90% C.L. limit on the branching fraction Br(B0 --> DS+ rho-)< 1.9*10-5. Assuming a flavor SU(3) symmetry relation between the decays B0 --> DS+ rho- and B0 --> D+ rho-, we set a limit on the ratio of CKM-suppressed to CKM-favored amplitudes r(D rho)<9.5*10-3 at 90% C.L. All results are preliminary.
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