Search for sterile neutrinos in MINOS and MINOS+ using a two-detector fit
2019
A search for mixing between active neutrinos and light sterile neutrinos has been performed by looking for muon neutrino disappearance in two detectors at baselines of 1.04 and 735 km, using a combined MINOS and MINOS+ exposure of
16.36
×
10
20
protons on target. A simultaneous fit to the charged-current muon neutrino and neutral-current neutrino energy spectra in the two detectors yields no evidence for sterile neutrino mixing using a
3
+
1
model. The most stringent limit to date is set on the mixing parameter
sin
2
θ
24
for most values of the sterile neutrino mass splitting
Δ
m
2
41
>
10
−
4
eV
2
.
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