Latest results of the OPERA experiment on nu-tau appearance in the CNGS neutrino beam
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Published:2019-02-20
Issue:1
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Container-title:SciPost Physics Proceedings
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Short-container-title:SciPost Phys. Proc.
Author:
Agafonova N.1, Alexandrov A.2, Anokhina A.3, Aoki S.4, Ariga A.5, Ariga T.56, Bertolin A.2, Bozza C.2, Brugnera R.27, Buonaura A.28, Buontempo S.2, Chernyavskiy M.9, Chukanov A.10, Consiglio L.2, D'Ambrosio N.2, De Lellis G.28, De Serio M.211, del Amo Sanchez P.12, Di Crescenzo A.28, Di Ferdinando D.13, Di Marco N.2, Dmitrievsky S.10, Dracos M.14, Duchesneau D.12, Dusini S.2, Dzhatdoev T.3, Ebert J.15, Ereditato A.5, Favier J.12, Fini R. A.13, Fornari F.1316, Fukuda T.17, Galati Giuliana28ORCID, Garfagnini A.27, Gentile V.18, Goldberg J.19, Gorbunov S.9, Gornushkin Y.10, Grella G.2, Guler A. M.20, Gustavino C.2, Hagner C.15, Hara T.4, Hayakawa T.17, Hollnagel A.15, Ishiguro K.17, Iuliano A.28, Jakovcic K.21, Jollet C.14, Kamiscioglu C.2220, Kamiscioglu M.20, Kim S. H.23, Kitagawa N.17, Klicek B.21, Kodama K.24, Komatsu M.17, Kose U.2, Kreslo I.5, Laudisio F.27, Lauria A.28, Longhin A.27, Loverre P.2, Malenica M.21, Malgin A.1, Mandrioli G.13, Matsuo T.25, Matveev V.1, Mauri N.1316, Medinaceli E.27, Meregaglia A.14, Mikado S.26, Miyanishi M.17, Mizutani F.4, Monacelli P.2, Montesi M. C.28, Morishima K.17, Muciaccia M. T.211, Naganawa N.17, Naka T.17, Nakamura M.17, Nakano T.17, Niwa K.17, Ogawa S.25, Olchevsky A.10, Okateva N.9, Ozaki K.4, Paoloni A.2, Paparella L.211, Park B. D.23, Pasqualini L.1316, Pastore A.2, Patrizii L.13, Pessard H.12, Pistillo C.5, Podgrudkov D.3, Polukhina N.927, Pozzato M.1316, Pupilli F.2, Roda M.27, Roganova T.3, Rokujo H.17, Rosa G.2, Ryazhskaya O.1, Sadovsky A.10, Sato O.17, Schembri A.2, Shakiryanova I.1, Shchedrina T.9, Shibayama E.4, Shibuya H.25, Shiraishi T.17, Simone S.211, Sirignano C.27, Sirri G.13, Sotnikov A.10, Spinetti M.2, Stanco L.2, Starkov N.9, Stellacci S. M.2, Stipcevic M.21, Strolin P.28, Takahashi S.4, Tenti M.13, Terranova F.28, Tioukov V.2, Tufanli S.5, Ustyuzhanin A.229, Vasina S.10, Vilain P.30, Voevodina E.2, Votano L.2, Vuilleumier J. L.5, Wilquet G.30, Wonsak B.15, Yoon C. S.23
Affiliation:
1. Institute for Nuclear Research 2. National Institute for Nuclear Physics 3. Moscow State University 4. Kobe University 5. University of Bern 6. Kyushu University 7. University of Padua 8. University of Naples Federico II 9. Institute of Physics. PN Lebedev, the Russian Academy of Sciences 10. Joint Institute for Nuclear Research 11. University of Bari Aldo Moro 12. University of Savoy 13. Istituto Nazionale di Fisica Nucleare Sezione di Bologna 14. University of Strasbourg 15. University of Hamburg 16. University of Bologna 17. Nagoya University 18. Gran Sasso Science Institute 19. Technion – Israel Institute of Technology 20. Middle East Technical University 21. Rudjer Boskovic Institute 22. Ankara University 23. Gyeongsang National University 24. Aichi University of Education 25. Toho University 26. Nihon University 27. Moscow Engineering Physics Institute 28. University of Milano-Bicocca 29. National Research University Higher School of Economics 30. Université Libre de Bruxelles
Abstract
OPERA is a long-baseline experiment designed to search for
\nu_{\mu}\to\nu_{\tau}νμ→ντ
oscillations in appearance mode. It was based at the INFN Gran Sasso
laboratory (LNGS) and took data from 2008 to 2012 with the CNGS neutrino
beam from CERN. After the discovery of \nu_\tauντ
appearance in 2015, with 5.1\sigma5.1σ
significance, the criteria to select \nu_\tauντ
candidates have been extended and a multivariate approach has been used
for events identification. In this way the statistical uncertainty in
the measurement of the oscillation parameters and of
\nu_\tauντ
properties has been improved. Results are reported.
Funder
Bundesministerium für Bildung und Forschung Centre National de la Recherche Scientifique Eidgenössische Technische Hochschule Zürich Fonds De La Recherche Scientifique - FNRS Instituto Nazionale di Fisica Nucleare Japan Society for the Promotion of Science Ministry of Education and Science of the Russian Federation Ministry of Education, Culture, Sports, Science and Technology Nagoya University National Research Foundation of Korea Russian Academy of Sciences Russian Foundation for Basic Research Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung Türkiye Bilimsel ve Teknolojik Araştirma Kurumu Universität Bern
Publisher
Stichting SciPost
Cited by
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1. References;The Physics of Neutrino Interactions;2020-06-30
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