Study of the decay B0(B0bar)-->rho+rho-, and constraints on the CKM angle alpha

B. Aubert

Using a data sample of 89 million Y(4s)-->B0B0bar decays collected with the BaBar detector at the PEP-II asymmetric B Factory at SLAC, we measure the B0(B0bar)-->rho+rho- branching…