KOFFEE: Kaon Observables at Future Fermilab Experimental Extensions

Cari Cesarotti, Samuel Homiller

The rare decays $K^{+}\to {\pi }^{+}\nu \bar{\nu }$ and $K_L\to {\pi }^0\nu \bar{\nu }$ are among the most precisely predicted flavor observables, enabling determinations of the CKM matrix and its CP-violating ph…