Evidence and Search for Sterile Neutrinos at Accelerators

Table 2

The LSND estimated number of events in the 20<𝐸_𝑒<60 MeV energy range due to 100% 𝜈_𝜇→𝜈_𝑒 transmutation and the two beam-related backgrounds with neutrons, 𝜇⁻ DAR in the beam stop followed by 𝜈_𝑒𝑝→𝑒⁺𝑛 scattering in the detector and 𝜋⁻ DIF in the beam stop followed by 𝜈_𝜇𝑝→𝜇⁺𝑛 scattering. The events must satisfy the electron selection criteria, but no correlated 𝛾 requirement is imposed.

Neutrino source	Reaction	Number of events
𝜇^+ DAR	100%  𝜈𝜇→𝜈𝑒	33300±3300
𝜇^− DAR	𝜈𝑒𝑝→𝑒^+𝑛	19.5±3.9
𝜋^− DIF	𝜈𝜇𝑝→𝜇^+𝑛	10.5±4.6