Adamson, P;
Aliaga, L;
Ambrose, D;
Anfimov, N;
Antoshkin, A;
Arrieta-Diaz, E;
Augsten, K;
... Zwaska, R; + view all
(2017)
Search for active-sterile neutrino mixing using neutral-current interactions in NOvA.
Physical Review D
, 96
(7)
, Article 072006. 10.1103/PhysRevD.96.072006.
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Abstract
We report results from the first search for sterile neutrinos mixing with active neutrinos through a reduction in the rate of neutral-current interactions over a baseline of 810 km between the NOvA detectors. Analyzing a 14-kton detector equivalent exposure of 6.05 × 1020 protons-on-target in the NuMI beam at Fermilab, we observe 95 neutral-current candidates at the Far Detector compared with 83.5 � 9.7ðstatÞ � 9.4ðsystÞ events predicted assuming mixing only occurs between active neutrino species. No evidence for νμ → νs transitions is found. Interpreting these results within a 3 þ 1 model, we place constraints on the mixing angles θ24 < 20.8° and θ34 < 31.2° at the 90% C.L. for 0.05 eV2 ≤ Δm2 41 ≤ 0.5 eV2, the range of mass splittings that produce no significant oscillations over the Near Detector baseline.
| Type: | Article |
|---|---|
| Title: | Search for active-sterile neutrino mixing using neutral-current interactions in NOvA |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.96.072006 |
| Publisher version: | http://doi.org/10.1103/PhysRevD.96.072006 |
| Language: | English |
| Additional information: | © 2017 American Physical Society. This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, Physics, Particles & Fields, Physics, ATMOSPHERIC NEUTRINOS, DARK-MATTER, SOLAR |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1562201 |
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