This Letter presents results of a search for the mixing of a sub-eV sterile neutrino with three active neutrinos based on the full data sample of the Daya Bay Reactor Neutrino Experiment, collected during 3158 days of detector operation, which contains reactor candidates identified as inverse beta-decay interactions followed by neutron capture on gadolinium. The analysis benefits from a doubling of the statistics of our previous result and from improvements of several important systematic uncertainties. No significant oscillation due to mixing of a sub-eV sterile neutrino with active neutrinos was found. Exclusion limits are set by both Feldman-Cousins and CLs methods. Light sterile neutrino mixing with can be excluded at 95% confidence level in the region of . This result represents the world-leading constraints in the region of .
An, F. P., et al. "Search for a Sub-eV Sterile Neutrino Using Daya Bay’s Full Dataset." Physical Review Letters, vol. 133, no. 5, Jul. 2024. https://doi.org/10.1103/PhysRevLett.133.051801
An, F. P., Bai, W. D., Balantekin, A. B., Bishai, M., Blyth, S., Cao, G. F., Cao, J., Chang, J. F., Chang, Y., Chen, H. S., Chen, H. Y., Chen, S. M., Chen, Y., Chen, Y. X., Chen, Z. Y., Cheng, J., Cheng, Y. -C., Cheng, Z. K., ... Zou, J. H. (2024). Search for a Sub-eV Sterile Neutrino Using Daya Bay’s Full Dataset. Physical Review Letters, 133(5). https://doi.org/10.1103/PhysRevLett.133.051801
An, F. P., Bai, W. D., Balantekin, A. B., et al., "Search for a Sub-eV Sterile Neutrino Using Daya Bay’s Full Dataset," Physical Review Letters 133, no. 5 (2024), https://doi.org/10.1103/PhysRevLett.133.051801
@article{osti_2406982,
author = {An, F. P. and Bai, W. D. and Balantekin, A. B. and Bishai, M. and Blyth, S. and Cao, G. F. and Cao, J. and Chang, J. F. and Chang, Y. and Chen, H. S. and others},
title = {Search for a Sub-eV Sterile Neutrino Using Daya Bay’s Full Dataset},
annote = { This Letter presents results of a search for the mixing of a sub-eV sterile neutrino with three active neutrinos based on the full data sample of the Daya Bay Reactor Neutrino Experiment, collected during 3158 days of detector operation, which contains 5.55 × 10 6 reactor ν ¯ e candidates identified as inverse beta-decay interactions followed by neutron capture on gadolinium. The analysis benefits from a doubling of the statistics of our previous result and from improvements of several important systematic uncertainties. No significant oscillation due to mixing of a sub-eV sterile neutrino with active neutrinos was found. Exclusion limits are set by both Feldman-Cousins and CLs methods. Light sterile neutrino mixing with sin 2 2 θ 14 ≳ 0.01 can be excluded at 95% confidence level in the region of 0.01 eV 2 ≲ | Δ m 41 2 | ≲ 0.1 eV 2 . This result represents the world-leading constraints in the region of 2 × 10 − 4 eV 2 ≲ | Δ m 41 2 | ≲ 0.2 eV 2 . Published by the American Physical Society 2024 },
doi = {10.1103/PhysRevLett.133.051801},
url = {https://www.osti.gov/biblio/2406982},
journal = {Physical Review Letters},
issn = {ISSN PRLTAO},
number = {5},
volume = {133},
place = {United States},
publisher = {American Physical Society},
year = {2024},
month = {07}}
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