Search for heavy neutrinos mixing with tau neutrinos

Authors
Astier, P Autiero, D Baldisseri, A Baldo-Ceolin, M 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 Silva, EDE Donnelly, IJ Dumarchez, J Ellis, M Fazio, T Feldman, GJ Ferari, R Ferrere, D Flaminio, V Fraternali, M Gaillard, JM Gangler, E Geiser, A Geppert, D Gibin, D Gninenko, SN Godley, A Gonzalez-Garcia, MC Gomez-Cadenas, JJ Gosset, J Gossling, C Gouanere, M Grant, A Graziani, G Guglielmi, A Hagner, C Hernando, J Hubbard, D Hurst, P Hyett, N Iacopini, E Joseph, C Juget, F Kirsanov, MM Klimov, O Kokkonen, J Kovzelev, AV Krasnikov, NV Krasnoperov, A Lacaprara, S Lachaud, C Lakic, B Lanza, A La Rotonda, L Laveder, M Letessier-Selvon, A Levy, JM Linssen, L Ljubicic, 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 Nefedov, Y Nguyen-Mau, C Orestano, D Pastore, F Peak, LS Pennacchio, E Pessard, H Petti, R Placci, A Polesello, G Pollmann, D Polyarush, A Popov, B Poulsen, C Rathouit, P Rico, J Roda, C Rubbia, A Salvatore, F Schahmaneche, K Schmidt, B Segneri, G Sevior, M Soler, FJP Sozzi, G Steele, D Stiegler, U Stipcevic, M Stolarczyk, T Tareb-Reyes, M Taylor, GN Tereshchenko, V Toropin, AN 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 Vidal-Sitjes, G Vieira, JM Vinogradova, T Weber, FV Weisse, T Wilson, FF Winton, LJ Yabsley, BD Zaccone, H Zuber, K Zuccon, P
Citation
P. Astier et al., Search for heavy neutrinos mixing with tau neutrinos, PHYS LETT B, 506(1-2), 2001, pp. 27-38
Citations number
66
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
506
Issue
1-2
Year of publication
2001
Pages
27 - 38
Database
ISI
SICI code
0370-2693(20010503)506:1-2<27:SFHNMW>2.0.ZU;2-D
Abstract
We report on a search for heavy neutrinos (upsilon (4)) produced in the dec ay D-s --> tau upsilon (4) at the SPS proton target followed by the decay u psilon (4) --> upsilon (tau)e(+)e(-) in the NOMAD detector. Both decays are expected to occur if upsilon (4) is a component of upsilon (tau). From the analysis of the data collected during the 1996-1998 runs with 4.1 x 10(19) protons on target, a single candidate event consistent with background exp ectations was found. This allows to derive an upper limit on the mixing str ength between the heavy neutrino and the tau neutrino in the upsilon (4) ma ss range from 10 to 190 MeV. Windows between the SN1987a and Big Bang Nucle osynthesis lower limits and our result are still open fur future experiment al searches. The results obtained are used to constrain an interpretation o f the time anomaly observed in the KARMEN1 detector. (C) 2001 Published by Elsevier Science B.V.