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Final NOMAD results on $\nu_{\mu} \to \nu_{\tau}$} and $\nu_e \to \nu_{\tau}$ oscillations including a new search for $\nu_{\tau}$ appearance using hadronic $\tau$ decays (2006) |
- Astier, P.,
- Autiero, D.,
- Baldisseri, A.,
- Baldo-Ceolin, M.,
- Banner, M.,
- Bassompierre, G.,
- Besson, N.,
- Bird, I.,
- Blumenfeld, B.,
- Bobisut, F.,
- Bouchez, J.,
- Boyd, S.,
- Bueno, A.,
- Bunyatov, S A.,
- Camilleri, L.,
- Cardini, A.,
- Cattaneo, P W.,
- Cavasinni, V.,
- Cavasinni, V.,
- Chukanov, 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.,
- Dumarchez, J.,
- Ellis, M.,
- Fazio, T.,
- Feldman, G.J.,
- Ferrari, R.,
- Ferrere, D.,
- Flaminio, V.,
- Fraternali, M.,
- Gaillard, J.M.,
- Gangler, E.,
- Geiser, A.,
- Geppert, D.,
- Gibin, D.,
- Gninenko, S.,
- Godley, A.,
- Gomez-Cadenas, J J.,
- Gosset, J.,
- Gossling, C.,
- Gouanere, M.,
- Grant, A.,
- Grant, A.,
- Grant, A.,
- Guglielmi, A.,
- Hagner, C.,
- Hernando, J.,
- Hubbard, D.,
- Hurst, P.,
- Hyett, N.,
- Iacopini, E.,
- Joseph, C L.,
- Juget, F.,
- Kirsanov, M.,
- Klimov, O.,
- Kokkonen, J.,
- Kovzelev, A.,
- Krasnoperov, A.,
- Kustov, D.,
- Kuznetsov, V.,
- Lacaprara, S.,
- Lachaud, C.,
- Lakic, B.,
- Lanza, A.,
- Lanza, A.,
- Lanza, A.,
- Lanza, A.,
- Letessier-Selvon, A.,
- Levy, J M.,
- Linssen, L.,
- Ljubicic, A.,
- Long, J.,
- Lupi, A.,
- Lupi, A.,
- Lupi, A.,
- Martelli, F.,
- Mechain, X.,
- Mendiburu, J.P.,
- Meyer, J P.,
- Mezzetto, M.,
- Mishra, S R.,
- Moorhead, G F.,
- Naumov, D.,
- Nedelec, P.,
- Nefedov, 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.,
- Roda, C.,
- Roda, C.,
- Salvatore, F.,
- Schahmaneche, K.,
- Schmidt, B.,
- Schmidt, T.,
- Sevior, M.,
- Sillou, D.,
- Soler, F J,
- Soler, F J,
- Sozzi, G.,
- Steele, D.,
- Stiegler, U.,
- Stipcevic, M.,
- Stolarczyk, T.,
- Tareb-Reyes, M.,
- Taylor, G,
- Taylor, G,
- 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.,
- Varvell, K E.,
- Varvell, K E.,
- Vercesi, V.,
- Vidal-Sitjes, G.,
- Vieira, J M.,
- Vinogradova, T.,
- Weber, F V.,
- Weisse, T.,
- Wilson, F F.,
- Winton, L J.,
- Yabsley, B D.,
- Zaccone, H.,
- Zuber, K.,
- Zuccon, P.
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Abstract |
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Results from the $\nu_{\tau}$ appearance search in a neutrino beam using the full NOMAD data sample are reported. A new analysis unifies all the hadronic $\tau$ 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\% C.L. allowed region in the $\sin^22\theta_{\mu\tau} - \Delta m^2$ plane which includes $\sin^22\theta_{\mu\tau}\ \ 3.3\times10^{-4}$ at large $\Delta m^2$ and $\Delta m^2 0.7$ eV$^2$/$c^4$ at $\sin^22\theta_{\mu \tau}=1$. The corresponding contour in the $\nuenutau$ oscillation hypothesis results in $\sin^22\theta_{e\tau}\ \ 1.5\times10^{-2}$ at large $\Delta m^2$ and $\Delta m^2 5.9$ eV$^2$/$c^4$ at $\sin^22\theta_{e \tau}=1$. We also derive limits on effective couplings of the $\tau$ lepton to \numu or \nue. \end{abstract} \begin{keyword} appearance, neutrino mass, neutrino oscillations \end{keyword} \end{frontmatter} |
Publication details |
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