A more sensitive search for vμ → Vτ oscillations in NOMAD

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

Research output: Contribution to journal › Article

37 Citations (Scopus)

Abstract

With additional data and improved algorithms, we have enhanced the sensitivity of our appearance search for vμ → vτ oscillations in the NOMAD detector in the CERN-SPS wide-band neutrino beam. The search uses kinematic criteria to identify vτ 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 sin22θμτ-Δm2plane. At large Δm2, the confidence region includes sin22θμτ <1.2 × 10-3 (a limit 3.5 times more stringent than in our previous publication), while at sin22θμτ = 1, the confidence region includes Δm2 < 1.2 eV2/c4.

Original languageEnglish (US)
Pages (from-to)169-186
Number of pages18
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume453
Issue number1-2
DOIs
StatePublished - Jan 1 1999
Externally publishedYes

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confidence
oscillations
neutrino beams
decay
inelastic scattering
kinematics
broadband
sensitivity
detectors
interactions

Keywords

  • Neutrino oscillations

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Astier, P., Autiero, D., Baldisseri, A., Baldo-Ceolin, M., Ballocchi, G., Banner, M., ... Zuccon, P. (1999). A more sensitive search for vμ → Vτ oscillations in NOMAD. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 453(1-2), 169-186. https://doi.org/10.1016/S0370-2693(99)00303-2

A more sensitive search for vμ → Vτ oscillations in NOMAD. / 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.; Reno, 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.; Zuccon, P.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 453, No. 1-2, 01.01.1999, p. 169-186.

Research output: Contribution to journal › Article

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, PW, 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, IJ, Dumarchez, J, Ellis, M, Fazio, T, Feldman, GJ, Ferrari, R, Ferrère, D, Flaminio, V, Fraternali, M, Gaillard, JM, Gandolfo, A, Gangler, E, Geiser, A, Geppert, D, Gibin, D, Gninenko, S, Godley, A, Gomez-Cadenas, JJ, 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, VE, Lacaprara, S, Lachaud, C, Lakić, B, Lanza, A, la Rotonda, L, Laveder, M, Letessier-Selvon, A, Levy, JM, Linssen, L, Ljubičić, A, Long, J, Lupi, A, Manola-Poggioli, E, Marchionni, A, Martelli, F, Méchain, X, Mendiburu, JP, Meyer, JP, Mezzetto, M, Mishra, SR, Moorhead, GF, Mossuz, L, Nédélec, P, Nefedov, Y, Nguyen-Mau, C, Orestano, D, Pastore, F, Peak, LS, Pennacchio, E, Pessard, H, Petti, R, Placci, A, Pluquet, A, Polesello, G, Pollmann, D, Popov, B, Poulsen, C, Rathouit, P, Reno, 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, FJP, Sozzi, G, Steele, D, Steininger, M, Stiegler, U, Stipčević, M, Stolarczyk, T, Tareb-Reyes, M, Taylor, GN, Tereshchenko, V, Toropin, A, Touchard, AM, Tovey, SN, Tran, MT, Tsesmelis, E, Ulrichs, J, Vacavant, L, Valdata-Nappi, M, Valuev, V, Vannucci, F, Varvell, KE, Veltri, M, Vercesi, V, Verkindt, D, Vieira, JM, Vinogradova, T, Vo, MK, Volkov, S, Weber, FV, Weisse, T, Wilson, FF, Winton, LJ, Yabsley, BD, Zaccone, H, Zuber, K & Zuccon, P 1999, 'A more sensitive search for vμ → Vτ oscillations in NOMAD', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 453, no. 1-2, pp. 169-186. https://doi.org/10.1016/S0370-2693(99)00303-2
Astier P, Autiero D, Baldisseri A, Baldo-Ceolin M, Ballocchi G, Banner M et al. A more sensitive search for vμ → Vτ oscillations in NOMAD. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 1999 Jan 1;453(1-2):169-186. https://doi.org/10.1016/S0370-2693(99)00303-2
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. ; Reno, 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. ; Zuccon, P. / A more sensitive search for vμ → Vτ oscillations in NOMAD. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 1999 ; Vol. 453, No. 1-2. pp. 169-186.
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title = "A more sensitive search for vμ → Vτ oscillations in NOMAD",
abstract = "With additional data and improved algorithms, we have enhanced the sensitivity of our appearance search for vμ → vτ oscillations in the NOMAD detector in the CERN-SPS wide-band neutrino beam. The search uses kinematic criteria to identify vτ 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 sin22θμτ-Δm2plane. At large Δm2, the confidence region includes sin22θμτ <1.2 × 10-3 (a limit 3.5 times more stringent than in our previous publication), while at sin22θμτ = 1, the confidence region includes Δm2 < 1.2 eV2/c4.",
keywords = "Neutrino oscillations",
author = "P. Astier and D. Autiero and A. Baldisseri and M. Baldo-Ceolin and G. Ballocchi and M. Banner and G. Bassompierre and K. Benslama and N. Besson and I. Bird and B. Blumenfeld and F. Bobisut and J. Bouchez and S. Boyd and A. Bueno and S. Bunyatov and L. Camilleri and A. Cardini and Cattaneo, {P. W.} and V. Cavasinni and A. Cervera-Villanueva and G. Collazuol and G. Conforto and C. Conta and M. Contalbrigo and R. Cousins and D. Daniels and H. Degaudenzi and {Del Prete}, T. and {de Santo}, A. and T. Dignan and {di Lella}, L. and {do Couto e Silva}, E. and Donnelly, {I. J.} and J. Dumarchez and M. Ellis and T. Fazio and Feldman, {G. J.} and R. Ferrari and D. Ferr{\`e}re and V. Flaminio and M. Fraternali and Gaillard, {J. M.} and A. Gandolfo and E. Gangler and A. Geiser and D. Geppert and D. Gibin and S. Gninenko and A. Godley and Gomez-Cadenas, {J. J.} and J. Gosset and C. G{\"o}{\ss}ling and M. Gouan{\`e}re and A. Grant and G. Graziani and A. Guglielmi and C. Hagner and J. Hernando and D. Hubbard and P. Hurst and N. Hyett and E. Iacopini and C. Joseph and F. Juget and M. Kirsanov and O. Klimov and J. Kokkonen and A. Kovzelev and A. Krasnoperov and Kuznetsov, {V. E.} and S. Lacaprara and C. Lachaud and B. Lakić and A. Lanza and {la Rotonda}, L. and M. Laveder and A. Letessier-Selvon and Levy, {J. M.} and L. Linssen and A. Ljubičić and J. Long and A. Lupi and E. Manola-Poggioli and A. Marchionni and F. Martelli and X. M{\'e}chain and Mendiburu, {J. P.} and Meyer, {J. P.} and M. Mezzetto and Mishra, {S. R.} and Moorhead, {G. F.} and L. Mossuz and P. N{\'e}d{\'e}lec and Y. Nefedov and C. Nguyen-Mau and D. Orestano and F. Pastore and Peak, {L. S.} and E. Pennacchio and H. Pessard and R. Petti and A. Placci and A. Pluquet and G. Polesello and D. Pollmann and B. Popov and C. Poulsen and P. Rathouit and R. Reno and G. Renzoni and J. Rico and P. Riemann and C. Roda and A. Rubbia and F. Salvatore and K. Schahmaneche and B. Schmidt and T. Schmidt and G. Segneri and M. Sevior and D. Sillou and Soler, {F. J.P.} and G. Sozzi and D. Steele and M. Steininger and U. Stiegler and M. Stipčević and T. Stolarczyk and M. Tareb-Reyes and Taylor, {G. N.} and V. Tereshchenko and A. Toropin and Touchard, {A. M.} and Tovey, {S. N.} and Tran, {M. T.} and E. Tsesmelis and J. Ulrichs and L. Vacavant and M. Valdata-Nappi and V. Valuev and F. Vannucci and Varvell, {K. E.} and M. Veltri and V. Vercesi and D. Verkindt and Vieira, {J. M.} and T. Vinogradova and Vo, {M. K.} and S. Volkov and Weber, {F. V.} and T. Weisse and Wilson, {F. F.} and Winton, {L. J.} and Yabsley, {B. D.} and H. Zaccone and K. Zuber and P. Zuccon",
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TY - JOUR

T1 - A more sensitive search for vμ → Vτ oscillations in NOMAD

AU - Astier, P.

AU - Autiero, D.

AU - Baldisseri, A.

AU - Baldo-Ceolin, M.

AU - Ballocchi, G.

AU - Banner, M.

AU - Bassompierre, G.

AU - Benslama, K.

AU - Besson, N.

AU - Bird, I.

AU - Blumenfeld, B.

AU - Bobisut, F.

AU - Bouchez, J.

AU - Boyd, S.

AU - Bueno, A.

AU - Bunyatov, S.

AU - Camilleri, L.

AU - Cardini, A.

AU - Cattaneo, P. W.

AU - Cavasinni, V.

AU - Cervera-Villanueva, A.

AU - Collazuol, G.

AU - Conforto, G.

AU - Conta, C.

AU - Contalbrigo, M.

AU - Cousins, R.

AU - Daniels, D.

AU - Degaudenzi, H.

AU - Del Prete, T.

AU - de Santo, A.

AU - Dignan, T.

AU - di Lella, L.

AU - do Couto e Silva, E.

AU - Donnelly, I. J.

AU - Dumarchez, J.

AU - Ellis, M.

AU - Fazio, T.

AU - Feldman, G. J.

AU - Ferrari, R.

AU - Ferrère, D.

AU - Flaminio, V.

AU - Fraternali, M.

AU - Gaillard, J. M.

AU - Gandolfo, A.

AU - Gangler, E.

AU - Geiser, A.

AU - Geppert, D.

AU - Gibin, D.

AU - Gninenko, S.

AU - Godley, A.

AU - Gomez-Cadenas, J. J.

AU - Gosset, J.

AU - Gößling, C.

AU - Gouanère, M.

AU - Grant, A.

AU - Graziani, G.

AU - Guglielmi, A.

AU - Hagner, C.

AU - Hernando, J.

AU - Hubbard, D.

AU - Hurst, P.

AU - Hyett, N.

AU - Iacopini, E.

AU - Joseph, C.

AU - Juget, F.

AU - Kirsanov, M.

AU - Klimov, O.

AU - Kokkonen, J.

AU - Kovzelev, A.

AU - Krasnoperov, A.

AU - Kuznetsov, V. E.

AU - Lacaprara, S.

AU - Lachaud, C.

AU - Lakić, B.

AU - Lanza, A.

AU - la Rotonda, L.

AU - Laveder, M.

AU - Letessier-Selvon, A.

AU - Levy, J. M.

AU - Linssen, L.

AU - Ljubičić, A.

AU - Long, J.

AU - Lupi, A.

AU - Manola-Poggioli, E.

AU - Marchionni, A.

AU - Martelli, F.

AU - Méchain, X.

AU - Mendiburu, J. P.

AU - Meyer, J. P.

AU - Mezzetto, M.

AU - Mishra, S. R.

AU - Moorhead, G. F.

AU - Mossuz, L.

AU - Nédélec, P.

AU - Nefedov, Y.

AU - Nguyen-Mau, C.

AU - Orestano, D.

AU - Pastore, F.

AU - Peak, L. S.

AU - Pennacchio, E.

AU - Pessard, H.

AU - Petti, R.

AU - Placci, A.

AU - Pluquet, A.

AU - Polesello, G.

AU - Pollmann, D.

AU - Popov, B.

AU - Poulsen, C.

AU - Rathouit, P.

AU - Reno, R.

AU - Renzoni, G.

AU - Rico, J.

AU - Riemann, P.

AU - Roda, C.

AU - Rubbia, A.

AU - Salvatore, F.

AU - Schahmaneche, K.

AU - Schmidt, B.

AU - Schmidt, T.

AU - Segneri, G.

AU - Sevior, M.

AU - Sillou, D.

AU - Soler, F. J.P.

AU - Sozzi, G.

AU - Steele, D.

AU - Steininger, M.

AU - Stiegler, U.

AU - Stipčević, M.

AU - Stolarczyk, T.

AU - Tareb-Reyes, M.

AU - Taylor, G. N.

AU - Tereshchenko, V.

AU - Toropin, A.

AU - Touchard, A. M.

AU - Tovey, S. N.

AU - Tran, M. T.

AU - Tsesmelis, E.

AU - Ulrichs, J.

AU - Vacavant, L.

AU - Valdata-Nappi, M.

AU - Valuev, V.

AU - Vannucci, F.

AU - Varvell, K. E.

AU - Veltri, M.

AU - Vercesi, V.

AU - Verkindt, D.

AU - Vieira, J. M.

AU - Vinogradova, T.

AU - Vo, M. K.

AU - Volkov, S.

AU - Weber, F. V.

AU - Weisse, T.

AU - Wilson, F. F.

AU - Winton, L. J.

AU - Yabsley, B. D.

AU - Zaccone, H.

AU - Zuber, K.

AU - Zuccon, P.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - With additional data and improved algorithms, we have enhanced the sensitivity of our appearance search for vμ → vτ oscillations in the NOMAD detector in the CERN-SPS wide-band neutrino beam. The search uses kinematic criteria to identify vτ 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 sin22θμτ-Δm2plane. At large Δm2, the confidence region includes sin22θμτ <1.2 × 10-3 (a limit 3.5 times more stringent than in our previous publication), while at sin22θμτ = 1, the confidence region includes Δm2 < 1.2 eV2/c4.

AB - With additional data and improved algorithms, we have enhanced the sensitivity of our appearance search for vμ → vτ oscillations in the NOMAD detector in the CERN-SPS wide-band neutrino beam. The search uses kinematic criteria to identify vτ 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 sin22θμτ-Δm2plane. At large Δm2, the confidence region includes sin22θμτ <1.2 × 10-3 (a limit 3.5 times more stringent than in our previous publication), while at sin22θμτ = 1, the confidence region includes Δm2 < 1.2 eV2/c4.

KW - Neutrino oscillations

UR - http://www.scopus.com/inward/record.url?scp=4243754778&partnerID=8YFLogxK

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U2 - 10.1016/S0370-2693(99)00303-2

DO - 10.1016/S0370-2693(99)00303-2

M3 - Article

AN - SCOPUS:4243754778

VL - 453

SP - 169

EP - 186

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 1-2

ER -

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