Search for invisible decays of the $\Lambda$ baryon

BESIII Collaboration, M. Ablikim, M. N. Achasov +498

A search for invisible decays of the $\Lambda$ baryon is carried out in the process $J/\psi \to \Lambda \bar{\Lambda }$ based on $(1.0087\pm 0.0044)\times 10^{10}$ $J/\psi$ events collected with the BESIII detect…