First measurement of polarizations in the decay $D^0 \to \omega \phi$
First measurement of polarizations in the decay $D^0 \to \omega \phi$
Using a data sample corresponding to an integrated luminosity of 2.93 fb$^{-1}$ collected at a center-of-mass energy $\sqrt{s}=3.773$ GeV by the BESIII detector, the decay $D^0 \to\omega\phi$ is observed for the first time. The branching fraction is measured to be $(6.48 \pm 0.96 \pm 0.40)\times 10^{-4}$ with a significance of …