Improved Limits on Sterile Neutrino Mixing from a Joint Search of the MINOS, MINOS+, Daya Bay, and Bugey-3 Experiments
Z. Hu*
on behalf of the Daya Bay and MINOS/MINOS+ collaborations*: corresponding author
Pre-published on:
January 04, 2021
Published on:
April 15, 2021
Abstract
The Daya Bay, MINOS and MINOS+ experiments have searched for sterile neutrino mixing using electron antineutrino and muon (anti)neutrino disappearance, respectively, within a minimally extended four-neutrino scenario. They have recently combined their results, together with those from the Bugey-3 reactor neutrino experiment, to set the most stringent limits to date on the θμe mixing angle over five orders of magnitude in the sterile mass-squared difference |Δm241|. The new constraints are significantly more stringent than the previous ones and exclude the sterileneutrino parameter space allowed by the LSND and MiniBooNE observations at 99% C.L.(CLs) for |Δm241|< 1.2 eV2, weakening the interpretation of these observations by the presence of a sterile neutrino. The result of the joint Daya Bay, MINOS, MINOS+ and Bugey-3 search along with a brief overview of the searches done by each experiment is presented.
DOI: https://doi.org/10.22323/1.390.0201
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