Measurement of $\Lambda$ baryon polarization in $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$ at $\sqrt{s}=3.773$ GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +505

Using a data sample of $\psi (3770)$ events collected with the BESIII detector at BEPCII corresponding to an integrated luminosity of 2.9 fb${}^{-1}$, we report a measurement of $\Lambda$ spin…