Search for active-sterile antineutrino mixing using neutral-current interactions with the NOvA experiment

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dc.creatorAcero Ortega, Mario A.
dc.creatorAdamson, P.
dc.creatorAsquith, L.
dc.creatorAnfimov, Nikolay
dc.creatorAntoshkin, A.
dc.creatorArrieta Diaz, Enrique
dc.creatorAsquith, Lily
dc.creatorAurisano, Adam
dc.creatorBack, A.
dc.creatorBackhouse, C.
dc.creatorGomes, Ricardo Avelino
dc.date.accessioned2023-05-22T15:41:01Z
dc.date.available2023-05-22T15:41:01Z
dc.date.issued2021
dc.description.abstractThis 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 11ðstat:Þ 15ðsyst:Þ assuming mixing only between three active flavors. No evidence for ¯νμ → ¯νs oscillation is observed. Interpreting this result within a 3 þ 1 model, constraints are placed on the mixing angles θ24 < 25° and θ34 < 32° at the 90% C.L. for 0.05 eV2 ≤ Δm2 41 ≤ 0.5 eV2, the range of mass splittings that produces no significant oscillations at the near detector. These are the first 3 þ 1 confidence limits set using long-baseline accelerator antineutrinos.pt_BR
dc.identifier.citationACERO, M. A. et al. Search for active-sterile antineutrino mixing using neutral-current interactions with the NOvA experiment. Physical Review Letters Washington, v. 127, e201801, 2021. DOI: 10.1103/PhysRevLett.127.201801. Disponível em: https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.127.201801. Acesso em: 16 maio 2023.pt_BR
dc.identifier.doi10.1103/PhysRevLett.127.201801
dc.identifier.issn0031-9007
dc.identifier.issne- 1079-7114
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/22600
dc.language.isoengpt_BR
dc.publisher.countryEstados unidospt_BR
dc.publisher.departmentInstituto de Física - IF (RGM)pt_BR
dc.rightsAcesso Abertopt_BR
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleSearch for active-sterile antineutrino mixing using neutral-current interactions with the NOvA experimentpt_BR
dc.typeArtigopt_BR

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