Improved constraints on sterile neutrino mixing from disappearance searches in the MINOS+Daya Bay, and Bugey-3 experiments
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2020
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Searches for electron antineutrino, muon neutrino, and muon antineutrino disappearance driven by
sterile neutrino mixing have been carried out by the Daya Bay and MINOSþ collaborations. This Letter
presents the combined results of these searches, along with exclusion results from the Bugey-3 reactor
experiment, framed in a minimally extended four-neutrino scenario. Significantly improved constraints on
the θμe mixing angle are derived that constitute the most constraining limits to date over five orders of
magnitude in the mass-squared splitting Δm2
41, excluding the 90% C.L. sterile-neutrino parameter space
allowed by the LSND and MiniBooNE observations at 90% CLs for Δm2
41 < 13 eV2
. Furthermore, the
LSND and MiniBooNE 99% C.L. allowed regions are excluded at 99% CLs for Δm2
41 < 1.6 eV2.
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ADAMSON, P. et al. Improved constraints on sterile neutrino mixing from disappearance searches in the MINOS+Daya Bay, and Bugey-3 experiments. Physical Review Letters, Washington, v. 125, e071801, 2020. DOI: 10.1103/PhysRevLett.125.071801. Disponível em: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.071801. Acesso em: 16 maio 2023.