A more sensitive search for ν_μ→ν_τ oscillations in NOMAD

Astier, P. et al. (1999) A more sensitive search for ν_μ→ν_τ oscillations in NOMAD. Physics Letters B, 453(1-2), pp. 169-186. (doi: 10.1016/S0370-2693(99)00303-2)

Abstract

With additional data and improved algorithms, we have enhanced the sensitivity of our appearance search for ν_μ→ν_τ oscillations in the NOMAD detector in the CERN-SPS wide-band neutrino beam. The search uses kinematic criteria to identify ν_τ charged current interactions followed by decay of the τ− to one of several decay modes. Our “blind” analyses of deep-inelastic scattering data taken in 1996 and 1997, combined with consistent reanalyses of previously reported 1995 data, yield no oscillation signal. For the two-family oscillation scenario, we present the contour outlining a 90% C.L. confidence region in the sin²2θ_μτ–Δm² plane. At large Δm², the confidence region includes sin²2θ_μτ<1.2×10⁻³ (a limit 3.5 times more stringent than in our previous publication), while at sin²2θ_μτ=1, the confidence region includes Δm²<1.2 eV²/c⁴.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Soler, Professor Paul
• Authors: Astier, P., Autiero, D., Baldisseri, A., Baldo-Ceolin, M., Ballocchi, G., Banner, M., Bassompierre, G., Benslama, K., Besson, N., Bird, I., Blumenfeld, B., Bobisut, F., Bouchez, J., Boyd, S., Bueno, A., Bunyatov, S., Camilleri, L., Cardini, A., Cattaneo, P.W., Cavasinni, V., Cervera-Villanueva, A., Collazuol, G., Conforto, G., Conta, C., Contalbrigo, M., Cousins, R., Daniels, D., Degaudenzi, H., Del Prete, T., De Santo, A., Dignan, T., Di Lella, L., do Couto e Silva, E., Donnelly, I.J., Dumarchez, J., Ellis, M., Fazio, T., Feldman, G.J., Ferrari, R., Ferrère, D., Flaminio, V., Fraternali, M., Gaillard, J.-M., Gandolfo, A., Gangler, E., Geiser, A., Geppert, D., Gibin, D., Gninenko, S., Godley, A., Gomez-Cadenas, J.-J., Gosset, J., Gößling, C., Gouanère, M., Grant, A., Graziani, G., Guglielmi, A., Hagner, C., Hernando, J., Hubbard, D., Hurst, P., Hyett, N., Iacopini, E., Joseph, C., Juget, F., Kirsanov, M., Klimov, O., Kokkonen, J., Kovzelev, A., Krasnoperov, A., Kuznetsov, V.E., Lacaprara, S., Lachaud, C., Lakić, B., Lanza, A., La Rotonda, L., Laveder, M., Letessier-Selvon, A., Levy, J.-M., Linssen, L., Ljubičić, A., Long, J., Lupi, A., Manola-Poggioli, E., Marchionni, A., Martelli, F., Méchain, X., Mendiburu, J.-P., Meyer, J.-P., Mezzetto, M., Mishra, S.R., Moorhead, G.F., Mossuz, L., Nédélec, P., Nefedov, Y., Nguyen-Mau, C., Orestano, D., Pastore, F., Peak, L.S., Pennacchio, E., Pessard, H., Petti, R., Placci, A., Pluquet, A., Polesello, G., Pollmann, D., Popov, B., Poulsen, C., Rathouit, P., Renò, R., Renzoni, G., Rico, J., Riemann, P., Roda, C., Rubbia, A., Salvatore, F., Schahmaneche, K., Schmidt, B., Schmidt, T., Segneri, G., Sevior, M., Sillou, D., Soler, F.J.P., Sozzi, G., Steele, D., Steininger, M., Stiegler, U., Stipčević, M., Stolarczyk, T., Tareb-Reyes, M., Taylor, G.N., Tereshchenko, V., Toropin, A., Touchard, A.-M., Tovey, S.N., Tran, M.-T., Tsesmelis, E., Ulrichs, J., Vacavant, L., Valdata-Nappi, M., Valuev, V., Vannucci, F., Varvell, K.E., Veltri, M., Vercesi, V., Verkindt, D., Vieira, J.-M., Vinogradova, T., Vo, M.-K., Volkov, S., Weber, F.V., Weisse, T., Wilson, F.F., Winton, L.J., Yabsley, B.D., Zaccone, H., Zuber, K., and Zuccon, P.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physics Letters B
• ISSN: 0370-2693