arXiv : Final results of the search for $\nu_{\mu} \to \nu_{e}$ oscillations with the OPERA detector in the CNGS beam

Agafonova, N.; Brugnera, R.; Di Marco, N.; Podgrudkov, D.; Patrizii, L.; Naganawa, N.; Shibuya, H.; Meisel, F.; Shchedrina, T.; Buonaura, A.; Kreslo, I.; del Amo Sanchez, P.; Fornari, F.; Bertolin, A.; Kim, S.H.; Schembri, A.; Aoki, S.; Okateva, N.; Voevodina, E.; Shibayama, E.; Polukhina, N.; Mizutani, F.; Dzhatdoev, T.; Ariga, T.; Votano, L.; Rokujo, H.; Pozzato, M.; Matsuo, T.; Muciaccia, M.T.; Yoon, C.S.; Hollnagel, A.; Grella, G.; Dusini, S.; Stipcevic, M.; Jollet, C.; Ozaki, K.; Klicek, B.; Mandrioli, G.; Paoloni, A.; Consiglio, L.; Paparella, L.; Ogawa, S.; Pupilli, F.; Duchesneau, D.; Morishima, K.; Garfagnini, A.; Pasqualini, L.; Ereditato, A.; Meregaglia, A.; Sato, O.; Nakamura, M.; Aleksandrov, A.; Guler, A.M.; Stellacci, S.M.; Vilain, P.; Di Crescenzo, A.; Kose, U.; Kodama, K.; Ebert, J.; Strolin, P.; Roda, M.; Kamiscioglu, M.; Park, B.D.; Hagner, C.; Sirignano, C.; Tenti, M.; De Lellis, G.; Kamiscioglu, C.; Miyanishi, M.; Takahashi, S.; Mauri, N.; Hayakawa, T.; Monacelli, P.; Shakiryanova, I.; Iuliano, A.; Dmitrievsky, S.; Naka, T.; Buontempo, S.; Starkov, N.; Vasina, S.; D'Ambrosio, N.; Laudisio, F.; Spinetti, M.; Galati, G.; Terranova, F.; Rosa, G.; Pastore, A.; Ljubicic, A.; Favier, J.; Roganova, T.; Fini, R.A.; Sotnikov, A.; Lauria, A.; Nakano, T.; Jakovcic, K.; Gustavino, C.; Gorbunov, S.; Hosseini, B.; Pessard, H.; Fukuda, T.; Malenica, M.; Ryazhskaya, O.; Bozza, C.; Ishiguro, K.; Mikado, S.; Chukanov, A.; Longhin, A.; Di Ferdinando, D.; Montesi, M.C.; Tioukov, V.; Simone, S.; Medinaceli, E.; Gornushkin, Y.; Goldberg, J.; Vuilleumier, J.L.; Gentile, V.; Dracos, M.; Matveev, V.; Niwa, K.; Kitagawa, N.; Komatsu, M.; Sirri, G.; Stanco, L.; Loverre, P.; Hara, T.; De Serio, M.; Chernyavskiy, M.; Wilquet, G.; Anokhina, A.; Shiraishi, T.; Malgin, A.; Ariga, A.

doi:10.1007/JHEP06(2018)151

Article
Report number	arXiv:1803.11400
Title	Final results of the search for $\nu_{\mu} \to \nu_{e}$ oscillations with the OPERA detector in the CNGS beam
Author(s)	Agafonova, N. (Moscow, INR) ; Aleksandrov, A. (INFN, Naples) ; Anokhina, A. (SINP, Moscow) ; Aoki, S. (Kobe U.) ; Ariga, A. (U. Bern, AEC) ; Ariga, T. (U. Bern, AEC ; Kyushu U.) ; Bertolin, A. (INFN, Padua) ; Bozza, C. (INFN, Salerno ; Salerno U.) ; Brugnera, R. (INFN, Padua ; Padua U.) ; Buonaura, A. (INFN, Naples ; Naples U.) ; Buontempo, S. (INFN, Naples) ; Chernyavskiy, M. (Lebedev Inst.) ; Chukanov, A. (Dubna, JINR) ; Consiglio, L. (INFN, Naples) ; D'Ambrosio, N. (Gran Sasso) ; De Lellis, G. (INFN, Naples ; Naples U.) ; De Serio, M. (Bari U. ; INFN, Bari) ; del Amo Sanchez, P. (Annecy, LAPP) ; Di Crescenzo, A. (INFN, Naples ; Naples U.) ; Di Ferdinando, D. (INFN, Bologna) ; Di Marco, N. (Gran Sasso) ; Dmitrievsky, S. (Dubna, JINR) ; Dracos, M. (Strasbourg, IPHC) ; Duchesneau, D. (Annecy, LAPP) ; Dusini, S. (INFN, Padua) ; Dzhatdoev, T. (SINP, Moscow) ; Ebert, J. (Hamburg U.) ; Ereditato, A. (U. Bern, AEC) ; Favier, J. (Annecy, LAPP) ; Fini, R.A. (INFN, Bari) ; Fornari, F. (INFN, Bologna ; U. Bologna, DIFA) ; Fukuda, T. (Nagoya U.) ; Galati, G. (INFN, Naples ; Naples U.) ; Garfagnini, A. (INFN, Padua ; Padua U.) ; Gentile, V. (GSSI, Aquila) ; Goldberg, J. (Technion) ; Gornushkin, Y. (Dubna, JINR) ; Gorbunov, S. (Lebedev Inst.) ; Grella, G. (INFN, Salerno ; Salerno U.) ; Guler, A.M. (Middle East Tech. U., Ankara) ; Gustavino, C. (INFN, Rome) ; Hagner, C. (Hamburg U.) ; Hara, T. (Kobe U.) ; Hayakawa, T. (Nagoya U.) ; Hollnagel, A. (Hamburg U.) ; Hosseini, B. (INFN, Naples ; Naples U.) ; Ishiguro, K. (Nagoya U.) ; Iuliano, A. (Naples U.) ; Jakovcic, K. (Boskovic Inst., Zagreb) ; Jollet, C. (Strasbourg, IPHC) ; Kamiscioglu, C. (Middle East Tech. U., Ankara ; Ankara U.) ; Kamiscioglu, M. (Middle East Tech. U., Ankara) ; Kim, S.H. (Gyeongsang Natl. U.) ; Kitagawa, N. (Nagoya U.) ; Klicek, B. (Boskovic Inst., Zagreb) ; Kodama, K. (Aichi U. of Education) ; Komatsu, M. (Nagoya U.) ; Kose, U. (INFN, Padua) ; Kreslo, I. (U. Bern, AEC) ; Laudisio, F. (INFN, Padua ; Padua U.) ; Lauria, A. (INFN, Naples ; Naples U.) ; Ljubicic, A. (Boskovic Inst., Zagreb) ; Longhin, A. (INFN, Padua ; Padua U.) ; Loverre, P. (INFN, Rome) ; Malgin, A. (Moscow, INR) ; Malenica, M. (Boskovic Inst., Zagreb) ; Mandrioli, G. (INFN, Bologna) ; Matsuo, T. (Toho U.) ; Matveev, V. (Moscow, INR) ; Mauri, N. (INFN, Bologna ; U. Bologna, DIFA) ; Medinaceli, E. (INFN, Padua ; Padua U.) ; Meisel, F. (U. Bern, AEC) ; Meregaglia, A. (Strasbourg, IPHC) ; Mikado, S. (Nihon U., Narashino) ; Miyanishi, M. (Nagoya U.) ; Mizutani, F. (Kobe U.) ; Monacelli, P. (INFN, Rome) ; Montesi, M.C. (INFN, Naples ; Naples U.) ; Morishima, K. (Nagoya U.) ; Muciaccia, M.T. (Bari U. ; INFN, Bari) ; Naganawa, N. (Nagoya U.) ; Naka, T. (Nagoya U.) ; Nakamura, M. (Nagoya U.) ; Nakano, T. (Nagoya U.) ; Niwa, K. (Nagoya U.) ; Okateva, N. (Lebedev Inst.) ; Ogawa, S. (Toho U.) ; Ozaki, K. (Kobe U.) ; Paoloni, A. (Frascati) ; Paparella, L. (Bari U. ; INFN, Bari) ; Park, B.D. (Gyeongsang Natl. U.) ; Pasqualini, L. (INFN, Bologna ; U. Bologna, DIFA) ; Pastore, A. (INFN, Bari) ; Patrizii, L. (INFN, Bologna) ; Pessard, H. (Annecy, LAPP) ; Podgrudkov, D. (SINP, Moscow) ; Polukhina, N. (Lebedev Inst. ; Moscow Phys. Eng. Inst.) ; Pozzato, M. (INFN, Bologna ; U. Bologna, DIFA) ; Pupilli, F. (INFN, Padua) ; Roda, M. (INFN, Padua ; Padua U.) ; Roganova, T. (SINP, Moscow) ; Rokujo, H. (Nagoya U.) ; Rosa, G. (INFN, Rome) ; Ryazhskaya, O. (Moscow, INR) ; Sato, O. (Nagoya U.) ; Schembri, A. (Gran Sasso) ; Shakiryanova, I. (Moscow, INR) ; Shchedrina, T. (Lebedev Inst.) ; Shibuya, H. (Toho U.) ; Shibayama, E. (Toho U.) ; Shiraishi, T. (Nagoya U.) ; Simone, S. (Bari U. ; INFN, Bari) ; Sirignano, C. (INFN, Padua ; Padua U.) ; Sirri, G. (INFN, Bologna) ; Sotnikov, A. (Dubna, JINR) ; Spinetti, M. (Frascati) ; Stanco, L. (INFN, Padua) ; Starkov, N. (Lebedev Inst.) ; Stellacci, S.M. (INFN, Salerno ; Salerno U.) ; Stipcevic, M. (Boskovic Inst., Zagreb) ; Strolin, P. (INFN, Naples ; Naples U.) ; Takahashi, S. (Kobe U.) ; Tenti, M. (INFN, Bologna) ; Terranova, F. (Milan Bicocca U.) ; Tioukov, V. (INFN, Naples) ; Vasina, S. (Dubna, JINR) ; Vilain, P. (Brussels U., IIHE) ; Voevodina, E. (INFN, Naples) ; Votano, L. (Frascati) ; Vuilleumier, J.L. (U. Bern, AEC) ; Wilquet, G. (Brussels U., IIHE) ; Yoon, C.S. (Gyeongsang Natl. U.)
Publication	2018-06-27
Imprint	2018-03-30
Number of pages	15
Note	Editors: M. Tenti and S. Vasina
In:	JHEP 06 (2018) 151
DOI	10.1007/JHEP06(2018)151
Subject category	physics.ins-det ; Detectors and Experimental Techniques ; hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN SPS ; OPERA CNGS1
Abstract	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 Chamber, 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 $\pi^0$s, 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 $m_{4}$ is introduced. At high $\Delta m^{2}_{41}$ $( \gtrsim 0.1 \textrm{eV}^{2})$, an upper limit on $\sin^2 2\theta_{\mu e}$ is set to 0.021 at 90% C.L. and $\Delta m^2_{41} \gtrsim 4 \times 10^{-3} \textrm{eV}^{2}$ is excluded for maximal mixing in appearance mode.
Copyright/License	publication: (License: CC-BY-4.0) preprint: (License: arXiv nonexclusive-distrib 1.0)

$The $\nu_{e}$ CC candidate selection efficiency as a function of the neutrino energy. Error bars indicate the MC statistical errors. The black line is a fitted curve to the simulated efficiency points and the grey area represents the systematic error.$ $Reconstructed versus MC energy for $\nu_e$ CC events in the OPERA Target Trackers.$