Search for the Decay $K_L^0\to {\pi }^0\nu \bar{\nu }$

E391a Collaboration, J. K. Ahn

We performed a search for the $K_L^0\to {\pi }^0\nu \bar{\nu }$ decay at the KEK 12-GeV proton synchrotron. No candidate events were observed. An upper limit on the branching ratio for the de…