NUK - logo
E-viri
Celotno besedilo
Odprti dostop
  • Updated constraints on sterile neutrino mixing in the OPERA experiment using a new $\nu_e$ identification method
    Anokhina, A; Aoki, S; Ariga, A; Ariga, T; Bozza, C; Buontempo, S; Chukanov, A; Consiglio, L; De Lellis, G; De Serio, M; Sanchez, P. del Amo; Di Crescenzo, A; Di Ferdinando, D; Di Marco, N; Dmitrievsky, S; Dracos, M; 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; Jollet, C; Kamiscioglu, C; Kamiscioglu, M; Kim, S. H; Kitagawa, N; Kodama, K; Komatsu, M; Kose, U; Kreslo, I; Lauria, A; Loverre, P; Matsuo, T; Matveev, V; Mauri, N; Medinaceli, E; Meregaglia, A; Mikado, S; Mizutani, F; Monacelli, P; Montesi, M. C; Muciaccia, M. T; Naganawa, N; Nakamura, M; Nakano, T; Niwa, K; Ogawa, S; Okateva, N; Ozaki, K; Paoloni, A; Paparella, L; 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; Simone, S; Stanco, L; Stellacci, S. M; Stipcevic, M; Takahashi, S; Tenti, M; Terranova, F; Tioukov, V; Tufanli, S; Vasina, S; Vilain, P; Voevodina, E; Votano, L; Wilquet, G; Yoon, C. S

    11/2022
    Journal Article

    This paper describes a new $\nu_e$ identification method specifically designed to improve the low-energy ($< 30\,\mathrm{GeV}$) $\nu_e$ 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 $\nu_e$ 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 $\nu_e$ candidate is found. The analysis combined with the $\nu_\tau$ appearance results improves the upper limit on $\sin^2 2\theta_{\mu e}$ to 0.016 at 90% C.L. in the MiniBooNE allowed region $\Delta m^2_{41} \sim 0.3\,\mathrm{eV}^2$.

Vnos na polico