Final NOMAD results on muon-neutrino ---> tau-neutrino and electron-neutrino ---> tau-neutrino oscillations including a new search for tau-neutrino appearance using hadronic tau decays.

Astier, P, Autiero, D, Baldisseri, A, Baldo-ceolin, M, Banner, M, Bassompierre, G, Benslama, K, Besson, N, Bird, I, Blumenfield, B, Bobisut, F, Bouchez, J, Boyd, S, Bueno, A, Bunyavot, S, Camilleri, L, Cardini, A, Cattaneo, PW, Cavasinni, V, Cervera-Villanueva, A, Chukanov, A, Collazoul, G, Conforto, G, Conta, C, Contalbrigo, M, Cousini, R, Daniles, D, Degaudenzi, H, Del Prete, T, De Santo, A, Dignan, T, Di Lella, L, do Cuoto e Silva, E, Dumarchez, J, Ellis, M, Fieldman, GJ, Ferrari, R, Ferrere, D, Flaminio, V, Fraternali, M, Gaillard, JM, Gangler, E, Geiser, A, Greppert, D, Gibin, D, Gninenko, S, Godley, A, Gomez-Cadenas, JJ, Gosset, J, Gößling, C, Gouanere, M, Grant, A, Graziani, G, Guglielm, A, Hagner, C, Hernando, J, Hubbard, D, Hurst, P, Hyett, N, Lacopini, E, Joseph, C, Juget, F, Kirsanov, M, Klimov, O, Kokkonen, J, Kovzelev, A, Krasnoperov, A, Kustov, D, Kuznetsov, VE, Lacrapana, S, Lachaud, C, Lakic, B, Lanza, A, La Rotonda, L, Laveder, M, Letessier-selvon, A, Levy, JM, Linssen, L, Ljubic, A, Long, J, Lupi, A, Marchionni, A, Martelli, F, Mechain, X, Mendiburu, JP, Meyer, JP, Mezzetto, M, Mishra, SR, Moorhead, GF, Naumov, D, Nedelec, P, Nefedovf, Yu, Nguyen-Mau, C, Orestano, D, Pastore, F, Peak, L.S, Pennacchio, E, Pessard, H, Petti, R, Placci, A, Polesello, G, Pollmann, D, Polyarush, A, Popov, B, Poulsen, C, Rico, J, Riemann, P, Roda, C, Rubbia, A, Salvatore, F, Schahmaneche, K, Schmidt, B, Schmidt, T, Sconza, A, Sevoir, M, Sillou, D, Soler, FJP, Sozzi, G, Steele, D, Stiegler, U, Stipčw, M, Stolarczyk, T, Tareb-Reyes, M, Tylor, GN, Tereshchenko, V, Toropin, A, Touchard, A-M, Tovey, SN, Tran, M.T, Tsesmelis, E, Ulrichs, J, Vacavant, L, Valdata-Nappi, M, Valuev, V, Vannucci, F, Varvell, KE, Veltri, M, Vercesi, V, Vidal-Sitjes, G, Vieira, JM, Vinogradova, T, Weber, FV, Weisse, T, Wilson, FF, Winton, LJ, Yabsley, BD, Zaccone, H, Zuber, Kai and Zuccon, P (2001) Final NOMAD results on muon-neutrino ---> tau-neutrino and electron-neutrino ---> tau-neutrino oscillations including a new search for tau-neutrino appearance using hadronic tau decays. Nuclear Physics B, 611 (1-3). pp. 3-39. ISSN 0550-3213

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Abstract

Results from the ντ appearance search in a neutrino beam using the full NOMAD data sample are reported. A new analysis unifies all the hadronic τ decays, significantly improving the overall sensitivity of the experiment to oscillations. The “blind analysis” of all topologies yields no evidence for an oscillation signal. In the two-family oscillation scenario, this sets a 90% CL allowed region in the sin22θμτ–Δm2 plane which includes sin22θμτ<3.3×10−4 at large Δm2 and Δm2< 0.7 eV2/c4 at sin22θμτ=1. The corresponding contour in the νe→ντ oscillation hypothesis results in sin22θeτ<1.5×10−2 at large Δm2 and Δm2<5.9 eV2/c4 at sin22θeτ=1. We also derive limits on effective couplings of the τ lepton to νμ or νe.

Item Type: Article
Additional Information: This is the final result of the NOMAD oscillation analysis. I was involved in the hardware (expert) to guarantee the data quality and in reconstruction of muon tracks in NOMAD. This is the most crucial input to determine the neutrino spectrum which resulted in the world's most sensitive oscillation search.
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: EPrints Services
Date Deposited: 06 Feb 2012 18:14
Last Modified: 30 Nov 2012 16:59
URI: http://sro.sussex.ac.uk/id/eprint/15349
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