Evidence and Search for Sterile Neutrinos at Accelerators

Table 3

Numbers of LSND beam-on events that satisfy the selection criteria for the primary 𝜈_𝜇→𝜈_𝑒 oscillation search with 𝑅_𝛾>1, 𝑅_𝛾>10, and 𝑅_𝛾>100. Also the beam-off background, the estimated neutrino background, and the excess of events that is consistent with neutrino oscillations are shown.

Selection	Beam-on	Beam-off	𝜈 background	Event excess
	events	background
𝑅𝛾>1	205	106.8±2.5	39.2±3.1	59.0±14.5±3.1
𝑅𝛾>10	86	36.9±1.5	16.9±2.3	32.2±9.4±2.3
𝑅𝛾>100	27	8.3±0.7	5.4±1.0	13.3±5.2±1.0