New Strategies for New Physics Search with ${\Lambda }_b\to \Lambda \nu \bar{\nu }$ Decays

Wolfgang Altmannshofer, Sri Aditya Gadam, Kevin Toner

We examine the new physics sensitivity of the rare decay ${\Lambda }_b\to \Lambda \nu \bar{\nu }$ which can be accessible at future $Z$-pole machines like FCC-ee and CEPC. We find that the longitudinal p…