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Search for heavy neutrinos mixing with tau neutrinos

  • P. Astier
  • , D. Autiero
  • , A. Baldisseri
  • , M. Baldo-Ceolin
  • , 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. Cavasinni
  • , A. 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, E. Gangler, A. Geiser, D. Geppert, D. Gibin, S. N. Gninenko, A. Godley, M. C. Gonzalez-Garcia, 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. M. Kirsanov, O. Klimov, J. Kokkonen, A. V. Kovzelev, N. V. Krasnikov, A. Krasnoperov, 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, A. Marchionni, F. Martelli, X. Méchain, J. P. Mendiburu, J. P. Meyer, M. Mezzetto, S. R. Mishra, G. F. Moorhead, D. Naumov, P. Nédélec, Yu Nefedov, C. Nguyen-Mau, D. Orestano, F. Pastore, L. S. Peak, E. Pennacchio, H. Pessard, R. Petti, A. Placci, G. Polesello, D. Pollmann, A. Polyarush, B. Popov, C. Poulsen, P. Rathouit, J. Rico, C. Roda, A. Rubbia, F. Salvatore, K. Schahmaneche, B. Schmidt, G. Segneri, M. Sevior, F. J.P. Soler, G. Sozzi, D. Steele, U. Stiegler, M. Stipčević, Th Stolarczyk, M. Tareb-Reyes, G. N. Taylor, V. Tereshchenko, A. N. 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, G. Vidal-Sitjes, J. M. Vieira, T. Vinogradova, F. V. Weber, T. Weisse, F. F. Wilson, L. J. Winton, B. D. Yabsley, H. Zaccone, K. Zuber, P. Zuccon
  • Universités Paris VI and VII
  • CERN
  • CEA Saclay
  • University of Padua
  • Université Savoie Mont Blanc
  • University of Lausanne
  • Johns Hopkins University
  • The University of Sydney
  • Harvard University
  • Swiss Federal Institute of Technology Zurich
  • Joint Institute for Nuclear Research
  • University of California at Los Angeles
  • University of Pavia
  • University of Pisa
  • Dept. Física At. Mol. y Nuclear
  • University of Urbino
  • TU Dortmund University
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • University of Florence
  • University of Melbourne
  • Ruder Boskovic Institute
  • University of Calabria
  • University of South Carolina
  • Roma Tre University
  • University of Perugia

Research output: Contribution to journalArticlepeer-review

135 Scopus citations

Abstract

We report on a search for heavy neutrinos (ν4) produced in the decay Ds → τν4 at the SPS proton target followed by the decay ν4 → ντe+e- in the NOMAD detector. Both decays are expected to occur if ν4 is a component of ντ . From the analysis of the data collected during the 1996-1998 runs with 4.1 × 1019 protons on target, a single candidate event consistent with background expectations was found. This allows to derive an upper limit on the mixing strength between the heavy neutrino and the tau neutrino in the ν4 mass range from 10 to 190 MeV. Windows between the SN1987a and Big Bang Nucleosynthesis lower limits and our result are still open for future experimental searches. The results obtained are used to constrain an interpretation of the time anomaly observed in the KARMEN 1 detector.

Original languageEnglish
Pages (from-to)27-38
Number of pages12
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume506
Issue number1-2
DOIs
StatePublished - May 3 2001

Keywords

  • Neutrino decay
  • Neutrino mixing

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