Observation of Y(3940) -> J/psi omega in B -> J/psi omega K at BABAR

The BABAR Collaboration, B. Aubert

We present a study of the decays $B^{0,+}\to J/\psi \omega K^{0,+}$ using $383\times 10^6$ $B\bar{B}$ events obtained with the \babar detector at PEP-II. We observe $Y(3940)\to J/\psi \omega$, wit…