Observation of Transverse $\Lambda /\bar{\Lambda }$ Hyperon Polarization in $e^{+}{e}^{-}$ Annihilation at Belle

The Belle Collaboration, A. Abdesselam, I. Adachi +445

We report the first observation of the polarization of $\Lambda /\bar{\Lambda }$ hyperons transverse to its production plane in $e^{+}{e}^{-}$ annihilation. We observe a significant polarization that ri…