Observation of Transverse Polarization and Determination of Psionic Form Factors of the $\Lambda$ Hyperon at $\sqrt{s}=3.773$ GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Using a data sample of $e^{+}{e}^{-}$ collision data corresponding to an integrated luminosity of 20.3 fb${}^{-1}$ collected by the BESIII detector at the BEPCII collider, we present a…