Abstract

This Letter presents the results from the MiniBooNE experiment within a full "3+1"scenario where one sterile neutrino is introduced to the three-active-neutrino picture. In addition to electron-neutrino appearance at short baselines, this scenario also allows for disappearance of the muon-neutrino and electron-neutrino fluxes in the Booster Neutrino Beam, which is shared by the MicroBooNE experiment. We present the 3+1 fit to the MiniBooNE electron-(anti)neutrino and muon-(anti)neutrino data alone and in combination with MicroBooNE electron-neutrino data. The best-fit parameters of the combined fit with the exclusive charged-current quasielastic analysis (inclusive analysis) are Δm2=0.209 eV2(0.033 eV2), |Ue4|2=0.016(0.500), |Uμ4|2=0.500(0.500), and sin2(2θμe)=0.0316(1.0). Comparing the no-oscillation scenario to the 3+1 model, the data prefer the 3+1 model with a Δχ2/d.o.f.=24.7/3(17.3/3), a 4.3σ(3.4σ) preference assuming the asymptotic approximation given by Wilks's theorem.

Original languageEnglish
Article number201801
JournalPhysical Review Letters
Volume129
Issue number20
DOIs
Publication statusPublished - 11 Nov 2022

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