PhysRevLett.127.201801.pdf (377.18 kB)
Search for active-sterile antineutrino mixing using neutral-current interactions with the NOvA experiment
Version 2 2023-06-12, 07:41
Version 1 2023-06-10, 02:35
journal contribution
posted on 2023-06-12, 07:41 authored by M A Acero, P Adamson, L Aliaga, N Anfimov, A Antoshkin, Lily AsquithLily Asquith, M Baird, Alexander Craig Booth, Jeff HartnellJeff Hartnell, Robert KralikRobert Kralik, Pierre Lasorak, Brett MayesBrett Mayes, D P Mendez, Joshua PorterJoshua Porter, Yibing Zhang, othersThis Letter reports results from the first long-baseline search for sterile antineutrinos mixing in an accelerator-based antineutrino-dominated beam. The rate of neutral-current interactions in the two NOvA detectors, at distances of 1 and 810 km from the beam source, is analyzed using an exposure of 12.51×1020 protons-on-target from the NuMI beam at Fermilab running in antineutrino mode. A total of 121 of neutral-current candidates are observed at the far detector, compared to a prediction of 122±11(stat.)±15(syst.) assuming mixing only between three active flavors. No evidence for ?¯µ??¯s oscillation is observed. Interpreting this result within a 3+1 model, constraints are placed on the mixing angles ?24<25° and ?34<32° at the 90% C.L. for 0.05 eV2=?m412=0.5 eV2, the range of mass splittings that produces no significant oscillations at the near detector. These are the first 3+1 confidence limits set using long-baseline accelerator antineutrinos.
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Journal
Physical Review LettersISSN
0031-9007Publisher
American Physical SocietyExternal DOI
Issue
20Volume
127Page range
1-8Article number
a201801Event location
United StatesDepartment affiliated with
- Physics and Astronomy Publications
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- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2022-02-10First Open Access (FOA) Date
2022-02-10First Compliant Deposit (FCD) Date
2022-02-09Usage metrics
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