New results on ν
                     
                μ
               → ν
                     
                τ
               appearance with the OPERA experiment in the CNGS beam

Agafonova, N.; Aleksandrov, A.; Anokhina, A.; Aoki, Shigeki; Ariga, A.; Ariga, T.; Asada, Takashi; Autiero, D.; Badertscher, A.; Dhahbi, Anis Ben; Bender, D.; Bertolin, A.; Bozza, C.; Brugnera, R.; Brunetti, G.; Büttner, B.; Buontempo, S.; Chaussard, L.; Chernyavskiy, M.; Chiarella, V.; Chukanov, A.; Consiglio, L.; D’Ambrosio, N.; Sanchez, P. del Amo; Lellis, G. De; Serio, M. De; Crescenzo, A. Di; Ferdinando, D. Di; Marco, N. Di; Dmitrievski, S.; Dracos, M.; Duchesneau, D.; Dusini, S.; Ebert, J.; Ereditato, A.; Favier, Jean; Ferber, T.; Fini, R. A.; Fukuda, Tsutomu; Garfagnini, A.; Giacomelli, G.; Goellnitz, C.; Goldberg, J.; Gornushkin, Y.; Grella, G.; Grianti, F.; Guler, A. M.; Gustavino, C.; Hagner, C.; Hakamata, K.; Hara, T.; Hayakawa, Tomokatsu; Hierholzer, M.; Hollnagel, A.; Hosseini, B.; Ishida, Hirokazu; Ishiguro, K.; Ishikawa, Masahiro; Jakovčić, K.; Jollet, C.; Kamiscioglu, C.; Kamiscioglu, M.; Katsuragawa, Taishi; Kawahara, H.; Kawada, J.; Kim, J. H.; Kim, S. H.; Kimura, Mitsuhiro; Kitagawa, N.; Kliček, B.; Kodama, K.; Komatsu, M.; Köse, U.; Kreslo, I.; Lauria, A.; Lenkeit, J.; Ljubičić, A.; Longhin, A.; Loverre, P.; Malgin, A. S.; Mandrioli, G.; Marteau, J.; Matsuo, T.; Matveev, V.; Mauri, N.; Medinaceli, E.; Meregaglia, A.; Migliozzi, P.; Mikado, S.; Minotti, A.; Miyanishi, M.; Miyashita, E.; Monacelli, P.; Montesi, M.C.; Morishima, Keisuke; Muciaccia, M. T.; Naganawa, N.; Naka, Takashi; Nakamura, Mitsuhiro; Nakano, T.; Nakatsuka, Y.; Niwa, K.; Ogawa, S.; Okateva, N.; Оlshevsky, А.G.; Omura, T.; Ozaki, K.; Paoloni, A.; Park, B. D.; Park, I. G.; Pastore, Alessandro; Patrizii, L.; Pennacchio, E.; Pessard, H.; Pistillo, C.; Подгрудков, Д.; Polukhina, N.; Pozzato, M.; Pretzl, K.; Pupilli, F.; Rescigno, R.; Roda, M.; Роганова, Т. М.; Rokujo, H.; Rosa, G. De; Rostovtseva, I.; Rubbia, A.; Russo, A.; Ryazhskaya, O. G.; Sato, Osamu; Sato, Yoshihiro; Schembri, Adam; Schmidt‐Parzefall, W.; Shakiryanova, I.; Schcedrina, T.; Sheshukov, A.; Shibuya, H.; Shiraishi, Takeshi; Shoziyoev, G.; Simone, S.; Sioli, M.; Sirignano, C.; Sirri, G.; Spinetti, M.; Stančo, L.; Старков, Н. И.; Stellacci, Francesco; Stipčević, M.; Strauss, T.; Strolin, P.; Suzuki, K.; Takahashi, Satoru; Tenti, M.; Terranova, F.; Tioukov, V.; Tolun, P.; Tufanli, S.; Vilain, P.; Vladimirov, M. S.; Votano, L.; Vuilleumier, J. L.; Wilquet, G.; Wonsak, Bjoern; Yoon, C. S.; Yoshida, J.; Yoshimoto, Masahiro; Zaitsev, Yu.; Zemskova, S.; Zghiche, A.

doi:10.1007/jhep11(2013)036

Cited by 73 publications

(58 citation statements)

References 54 publications

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“…in the oscillation parameters region discovered by detecting atmospheric neutrinos [3]. OPERA has observed four ν τ CC interaction candidate events [4][5][6][7], consistent with the expectation of the standard oscillation framework at this scale. This result represents the first direct evidence of ν µ → ν τ oscillation in appearance mode.…”

supporting

confidence: 62%

“…OPERA collected data corresponding to 17.97 × 10 19 protons on target (pot) with 19505 recorded events. The data sample used in this analysis is defined following the selection criteria described in [5] and corresponds to about 75% of the total statistics.…”

Section: Detector Beam and Data Samplementioning

confidence: 99%

“…Bricks selected as candidates to contain CNGS neutrino interactions are analysed following the procedure described in detail in [5]. Here we just recall the main steps of the analysis.…”

Section: Search For ν τ Interactionsmentioning

confidence: 99%

See 2 more Smart Citations

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

Agafonova¹,

Aleksandrov²,

Anokhina³

et al. 2015

J. High Energ. Phys.

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Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beamThe OPERA collaboration E-mail: alessandro.paoloni@lnf.infn.it, alessandra.pastore@ba.infn.it Abstract: The OPERA experiment, exposed to the CERN to Gran Sasso ν µ beam, collected data from 2008 to 2012. Four oscillated ν τ Charged Current interaction candidates have been detected in appearance mode, which are consistent with ν µ → ν τ oscillations at the atmospheric ∆m 2 within the "standard" three-neutrino framework. In this paper, the OPERA ν τ appearance results are used to derive limits on the mixing parameters of a massive sterile neutrino. The OPERA collaboration 11 IntroductionThe OPERA experiment [1] operated in the CERN Neutrinos to Gran Sasso (CNGS) beam produced at CERN and directed towards the Gran Sasso Underground Laboratory of INFN (LNGS), 730 km away, where the detector is located. The experiment is unique in its capability to observe ν τ appearance on an event-by-event basis. Nuclear emulsion films instrumenting the target allow the detection of the short-lived τ lepton decay, and hence the identification of ν τ Charged Current (CC) interactions. The standard three-neutrino oscillation framework predicts ν µ → ν τ oscillations with close-to-maximal mixing at the so-called atmospheric scale, ∆m 2 32 ∼ 2.4 × 10 −3 eV 2 [2], i.e. in the oscillation parameters region discovered by detecting atmospheric neutrinos [3]. OPERA has observed four ν τ CC interaction candidate events [4][5][6][7], consistent with the expectation of the standard oscillation framework at this scale. This result represents the first direct evidence of ν µ → ν τ oscillation in appearance mode.In the present paper, limits are derived on the existence of a massive sterile neutrino. The excess of ν e (ν e ) observed by the LSND [8] and MiniBooNE [9] collaborations and the so-called reactor [10] and Gallium [11,12] neutrino anomalies are also interpreted as due to the existence of a fourth sterile neutrino with mass at the eV scale. In relation to this issue, it is worth mentioning that the effective number of neutrino-like species decoupled from the primeval plasma measured by the Planck collaboration is 3.15 ± 0.23 at 95% Confidence Level (CL) [13].Neutrino oscillations at large ∆m 2 have been searched for by several short baseline experiments. The most stringent limits on ν µ → ν τ oscillations were set by the NOMAD [14] and CHORUS [15] experiments, with high sensitivity for ∆m 2 values larger than 10 eV 2 .In the following, a short description of the OPERA experimental setup and of the procedure used to detect ν τ interactions is given, the data analysis is described and exclusion regions in the parameter space are derived.

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supporting

confidence: 62%

Section: Detector Beam and Data Samplementioning

confidence: 99%

See 1 more Smart Citation

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

Agafonova¹,

Aleksandrov²,

Anokhina³

et al. 2015

J. High Energ. Phys.

Self Cite

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“…On top of the large uncertainty, DONUT could not separate tau neutrinos from anti-neutrinos. The OPERA experiment [4] has detected five tau neutrinos [13][14][15][16][17], leading to the discovery of tau neutrino appearance from muon neutrino oscillations [17]. The only leptonic decay observed by OPERA [15] shows negative charge as expected from a ν τ interaction.…”

Section: Physics With the Neutrino Detectormentioning

confidence: 99%

The SHiP physics program

Lellis

2018

EPJ Web Conf.

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Abstract. The discovery of the Higgs boson has fully confirmed the Standard Model of particles and fields. Nevertheless, there are still fundamental phenomena, like the existence of dark matter and the baryon asymmetry of the Universe, which deserve an explanation that could come from the discovery of new particles. The SHiP experiment at CERN meant to search for very weakly coupled particles in the few GeV mass domain has been recently proposed. The existence of such particles, foreseen in different theoretical models beyond the Standard Model, is largely unexplored. A beam dump facility using high intensity 400 GeV protons is a copious source of such unknown particles in the GeV mass range. The beam dump is also a copious source of neutrinos and in particular it is an ideal source of tau neutrinos, the less known particle in the Standard Model. Indeed, tau anti-neutrinos have not been directly observed so far. We report the physics potential of such an experiment including the tau neutrino magnetic moment.

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“…The experiment is unique in its capability to observe ν τ appearance on an event-by-event basis. Nuclear emulsion films instrumenting the target allow the detection of the short-lived τ lepton decay, and hence the identification of ν τ Charged Current (CC) interactions [3]. So far, the OPERA experiment observed four ν τ CC interaction candidates, consistent with 2.3 events expected in the standard three neutrino oscillations framework at the so-called atmospheric scale (∆m 2 32 ∼ 2.4 × 10 −3 eV 2 [4]) with close-to-maximal mixing.…”

Section: Introductionmentioning

confidence: 99%

Search for sterile neutrino mixing in the muon neutrino to tau neutrino appearance channel with the OPERA detector

Tenti¹

2016

Proceedings of XVI International Workshop on Neutrino Telescopes — PoS(NEUTEL2015)

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The OPERA experiment observed ν µ → ν τ oscillations in the atmospheric sector. To this purpose the hybrid OPERA detector was exposed to the CERN Neutrinos to Gran Sasso beam from 2008 to 2012, at a distance of 730 km from the neutrino source. Charged-current interactions of ν τ were searched for through the identification of τ lepton decay topologies. The four observed ν τ interactions are consistent with the expected number of events in the standard three neutrino framework. In this work, we interpret the results in terms of the 3 + 1 sterile neutrino model using the GLoBES software. This analysis allows to constrain the effective mixing of the sterile and the new squared mass difference.

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New results on ν μ → ν τ appearance with the OPERA experiment in the CNGS beam

Cited by 73 publications

References 54 publications

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

The SHiP physics program

Search for sterile neutrino mixing in the muon neutrino to tau neutrino appearance channel with the OPERA detector

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