Event Excess in the MiniBooNE Search for ${\bar{\nu }}_{\mu }\to {\bar{\nu }}_e$ Oscillations

The MiniBooNE Collaboration

The MiniBooNE experiment at Fermilab reports results from a search for ${\bar{\nu }}_{\mu }\to {\bar{\nu }}_e$ oscillations, using a data sample corresponding to $5.66\times 10^{20}$ proto…