Final results of the search for νμ → νe oscillations with the OPERA detector in the CNGS beam

OPERA Collaboration, Tomoko Ariga

研究成果: ジャーナルへの寄稿学術誌査読

16 被引用数 (Scopus)


The OPERA experiment has discovered the tau neutrino appearance in the CNGS muon neutrino beam, in agreement with the 3 neutrino flavour oscillation hypothesis. The OPERA neutrino interaction target, made of Emulsion Cloud Chambers, was particularly efficient in the reconstruction of electromagnetic showers. Moreover, thanks to the very high granularity of the emulsion films, showers induced by electrons can be distinguished from those induced by π0s, thus allowing the detection of charged current interactions of electron neutrinos. In this paper the results of the search for electron neutrino events using the full dataset are reported. An improved method for the electron neutrino energy estimation is exploited. Data are compatible with the 3 neutrino flavour mixing model expectations and are used to set limits on the oscillation parameters of the 3+1 neutrino mixing model, in which an additional mass eigenstate m4 is introduced. At high Δm412 (≳0.1 eV2), an upper limit on sin2μe is set to 0.021 at 90% C.L. and Δm412 ≳ 4 × 10− 3 eV2 is excluded for maximal mixing in appearance mode.[Figure not available: see fulltext.].

ジャーナルJournal of High Energy Physics
出版ステータス出版済み - 6月 1 2018

!!!All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学


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