The influence of invisible light particles on ${\Lambda }_b\to \Lambda E_{\mathrm{miss}}$

Quan-Yi Hu, Zhi-Bin Duan

In this work, we study the contribution of invisible light particles to ${\Lambda }_b\to \Lambda E_{\mathrm{miss}}$, particularly the three-body decays ${\Lambda }_b\to \Lambda \varphi \bar{\varphi }$ and ${\Lambda }_b\to \Lambda \psi \bar{\psi }$. Th…