Spin-Parity Analysis of theBMeson

From the decay distribution and the polarization of the $\omega$ in $B\to \omega \pi$, the $B$ is found to have either $J^P=1^{+}$ or $J^P=2^{+}{3}^{-}{4}^{+}\cdots$. The observed polarization of the $B$ appears more plausible for the $J^P=1^{+}$ hypothesis.