Updated constraints on sterile neutrino mixing in the OPERA experiment using a new νe identification method. (24th January 2023)

• Record Type: Journal Article
• Authors: Agafonova, N; Alexandrov, A; Anokhina, A; Aoki, S; Ariga, A; Ariga, T; Bertolin, A; Bozza, C; Brugnera, R; Buontempo, S; Chernyavskiy, M; Chukanov, A; Consiglio, L; D'Ambrosio, N; De Lellis, G; De Serio, M; del Amo Sanchez, 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; Fukuda, T; Galati, G; Garfagnini, A; Gentile, V; Goldberg, J; Gorbunov, S; Gornushkin, Y; Grella, G; Guler, A M; Gustavino, C; Hagner, C; Hara, T; Hayakawa, T; Hollnagel, A; Ishiguro, K; Iuliano, A; Jakovčć, K; Jollet, C; Kamiscioglu, C; Kamiscioglu, M; Kim, S H; Kitagawa, N; Kliček, B; Kodama, K; Komatsu, M; Kose, U; Kreslo, I; Laudisio, F; Lauria, A; Longhin, A; Loverre, P; 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; Paoloni, A; 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; Stipčevic, M; Strolin, P; Takahashi, S; Tenti, M; Terranova, F; Tioukov, V; Tufanli, S; Vasina, S; Vilain, P; Voevodina, E; Votano, L; Vuilleumier, J L; Wilquet, G; Yoon, C S;
• Is Part Of: Progress of theoretical and experimental physics. Volume 2023:Number 3(2023)
• Publication Date: 2023-01-24
• Subjects: Physics -- Periodicals; Mathematical physics -- Periodicals; 530.05
• DOI: 10.1093/ptep/ptad012
• Languages: English
• ISSNs: 2050-3911

Abstract

Abstract: This paper describes a new ν e identification method specifically designed to improve the low-energy ($\lt {30}\, {\rm GeV}$ ) ν e identification efficiency attained by enlarging the emulsion film scanning volume with the next-generation emulsion readout system. A relative increase of 25–70% in the ν e low-energy region is expected, leading to improvements in the OPERA sensitivity to neutrino oscillations in the framework of the 3 + 1 model. The method is applied to a subset of data where the detection efficiency increase is expected to be more relevant, and one additional ν e candidate is found. The analysis combined with the ντ appearance results improves the upper limit on sin 2 2θμ e to 0.016 at 90% C.L. in the MiniBooNE allowed region $\Delta m^2_{41} \sim {0.3}\, {\rm eV}^{2}$ .