Results from the OPERA Experiment in the CNGS Beam

Paoloni, Alessandro
Agafonova, N.
Alexandrov, A.
Anokhina, A.
Aoki, S.
Ariga, A.
Ariga, T.
Bertolin, A.
Bozza, C.
Brugnera, R.
Buonaura, A.
Buontempo, S.
Chernyavskiy, M.
Chukanov, A.
Consiglio, L.
D'Ambrosio, N.
De Lellis, G.
De Serio, M.
Sanchez, Del Amo P.
Di Crescenzo, A.
Di Ferdinando, D.
Di Marco, N.
Dmitrievsky, S.
Dracos, M.
Duchesneau, D.
Dusini, S.
Dzhatdoev, T.
Ebert, J.
Ereditato, A.
Fini, R. A.
Fornari, F.
Fukuda, T.
Galati, G.
Garfagnini, A.
Gentile, V
Goldberg, J.
Gorbunov, S.
Gornushkin, Y.
Grella, G.
Güler, Ali Murat
Gustavino, C.
Hagner, C.
Hara, T.
Hayakawa, T.
Hollnagel, A.
Ishiguro, K.
Iuliano, A.
Jakovcic, K.
Jollet, C.
Kamiscioglu, C.
Kamiscioglu, M.
Kim, S. H.
Kitagawa, N.
Klicek, B.
Kodama, K.
Komatsu, M.
Kose, U.
Kreslo, I
Laudisio, F.
Lauria, A.
Ljubicic, A.
Longhin, A.
Loverre, P. F.
Malgin, A.
Mandrioli, G.
Matsuo, T.
Matveev, V
Mauri, N.
Medinaceli, E.
Meregaglia, A.
Mikado, S.
Miyanishi, M.
Mizutani, F.
Monacelli, P.
Montesi, M. C.
Morishima, K.
Muciaccia, M. T.
Naganawa, N.
Naka, T.
Nakamura, M.
Nakano, T.
Niwa, K.
Ogawa, S.
Okateva, N.
Ozaki, K.
Paparella, L.
Park, B. D.
Pasqualini, L.
Pastore, A.
Patrizii, L.
Pessard, H.
Podgrudkov, D.
Polukhina, N.
Pozzato, M.
Pupilli, F.
Roda, M.
Roganova, T.
Rokujo, H.
Rosa, G.
Ryazhskaya, O.
Sato, O.
Schembri, A.
Shakiryanova, I
Shchedrina, T.
Shibayama, E.
Shibuya, H.
Shiraishi, T.
Simone, S.
Sirignano, C.
Sirri, G.
Sotnikov, A.
Spinetti, M.
Stanco, L.
Starkov, N.
Stellacci, S. M.
Stipcevic, M.
Strolin, P.
Takahashi, S.
Tenti, M.
Terranova, F.
Tioukov, V
Vasina, S.
Vilain, P.
Voevodina, E.
Votano, L.
Vuilleumier, J. L.
Wilquet, G.
Yoon, C. S.
The OPERA experiment was designed to observe v(mu) -> v(tau) oscillations through tau appearance on the CERN Neutrino to Gran Sasso (CNGS) beam over a baseline of 730 km. OPERA was a hybrid experiment composed of lead plates and emulsion layers acting as a target for neutrino interactions. The experiment was complemented with electronic detectors: scintillator strips used as Target Trackers and muon spectrometers. A review of the OPERA final results is presented in this paper.


More Results from the Opera Experiment at the Gran Sasso Underground Lab
Kamışcıoğlu, Mustafa (World Scientific Pub Co Pte Lt; 2017-09-05)
The OPERA experiment reached its main goal by proving the appearance of nu(tau) in the CNGS nu(mu) beam. Five nu(tau) candidates fulfilling the analysis defined in the proposal were detected with a S/B ratio of about ten allowing to reject the null hypothesis at 5.1 sigma. The search has been extended by loosening the selection criteria in order to obtain a statistically enhanced, lower purity, signal sample. One such interesting neutrino interaction with a double vertex topology having a high probability o...
Procedure for short-lived particle detection in the OPERA experiment and its application to charm decays
Agafonova, N.; et. al. (2014-08-01)
The OPERA experiment, designed to perform the first observation of nu(mu) -> nu(tau) oscillations in appearance mode through the detection of the tau leptons produced in nu(tau) charged current interactions, has collected data from 2008 to 2012. In the present paper, the procedure developed to detect tau particle decays, occurring over distances of the order of 1 mm from the neutrino interaction point, is described in detail and applied to the search for charmed hadrons, showing similar decay topologies as ...
OPERA neutrino oscillation results
Güler, Ali Murat (2012-11-01)
The OPERA experiment was designed to perform the first detection of v(mu) -> v(T) neutrino oscillations in a direct appearance mode. We present the analysis results of the 2008-2009 statistics corresponding to 4.88 x 10 19 p.o.t. In this sample, one v(T) candidate event has been observed in the T -> h channel. The statistical significance of this observation is estimated to be 95%.
Study of charged hadron multiplicities in charged-current neutrino-lead interactions in the OPERA detector
Agafonova, N.; et. al. (Springer Science and Business Media LLC, 2018-01-24)
The OPERA experiment was designed to search for nu(mu) -> nu(tau) oscillations in appearance mode through the direct observation of tau neutrinos in the CNGS neutrino beam. In this paper, we report a study of the multiplicity of charged particles produced in charged-current neutrino interactions in lead. We present charged hadron average multiplicities, their dispersion and investigate the KNO scaling in different kinematical regions. The results are presented in detail in the form of tables that can be use...
Study of electron identification in the opera detector
Bay, M. Fatih; Güler, Ali Murat; Department of Physics (2008)
The OPERA experiment is designed to perform first direct observation of $\nu_{\tau}$ appearance in an almost pure $\nu_{\mu}$ beam. The OPERA detector is a hybrid set-up which combines a lead/emulsion target with various electronic detectors. It is located in Gran Sasso Laboratory (LNGS), 730 km away from CERN where neutrino beam is produced. A good electron identification in the ECC brick would also allow OPERA to search for $\nu_{\mu}\rightarrow\nu_{e}$ oscillations. We have studied electron identificatio...
Citation Formats
A. Paoloni et al., “Results from the OPERA Experiment in the CNGS Beam,” UNIVERSE, vol. 4, no. 12, pp. 0–0, 2018, Accessed: 00, 2023. [Online]. Available: