Study of Decays Bd → J/Ψ + K* and Bs → J/Ψ + φ with the D0 detector

We present measurements of the linear polarization amplitudes and the strong relative phases that describe the flavor-untagged decays Bd → J/Ψ K* and Bs → J/Ψφ in the transversity basis. We also measure the mean lifetime of the Bs mass eigenstates and the lifetime ratio. The analyses are based on approximately 2.8 fb-1 of data recorded with the D0 detector. From our measurements of the angular parameters we conclude that there is no evidence for a deviation from flavor SU(3) symmetry for these decays and that the factorization assumption is not valid for the Bd → J/Ψ K* decay.