$CP$ Invariance Study of $J/\psi \to \Lambda \bar{\Lambda }$ and $\Lambda$ Nonpleptonic Decays in Helicity Frame

Bin Zhong, Guangrui Liao

We present the joint helicity amplitudes for $J/\psi \to \Lambda \bar{\Lambda }$, $\Lambda (\bar{\Lambda })$ decays to different final states in the helicity frame. Two observables to search for $CP$ violation in $J/…