Improved Sterile Neutrino Constraints from the STEREO Experiment with 179 Days of Reactor-On Data

Understand

The STEREO experiment is a very short baseline reactor antineutrino experiment.

• It is designed to test the hypothesis of light sterile neutrinos being the cause of a deficit of the observed antineutrino interaction rate at short baselines with respect to the predicted rate, known as the reactor antineutrino anomaly.
• The STEREO experiment measures the antineutrino energy spectrum in six identical detector cells covering baselines between 9 and 11 m from the compact core of the ILL research reactor.
• In this article, results from 179 days of reactor turned on and 235 days of reactor turned off are reported at a high degree of detail.