Search for ${\pi }^0\to {\nu }_{\mu }{\bar{\nu }}_{\mu }$ Decay in LSND

L. B. Auerbach, R. L. Burman, D. O. Caldwell +28

We observe a net beam-excess of $8.7\pm 6.3$ (stat) $\pm 2.4$ (syst) events, above 160 MeV, resulting from the charged-current reaction of ${\nu }_{\mu }$ and/or ${\bar{\nu }}_{\mu }$ on C and H in the…