Search for heavy neutrinos mixing with tau neutrinos

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, Vincenzo; 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, Chiara Maria Angela; 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.

doi:10.1016/S0370-2693(01)00362-8

We report on a search for heavy neutrinos (upsilon (4)) produced in the decay D-s --> tau upsilon (4) at the SPS proton target followed by the decay upsilon (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 expectations was found. This allows to derive an upper limit on the mixing strength between the heavy neutrino and the tau neutrino in the upsilon (4) mass range from 10 to 190 MeV. Windows between the SN1987a and Big Bang Nucleosynthesis lower limits and our result are still open fur future experimental searches. The results obtained are used to constrain an interpretation of the time anomaly observed in the KARMEN1 detector. (C) 2001 Published by Elsevier Science B.V. RI Vercesi, Valerio/C-6672-2008; Collazuol, Gianmaria/C-5670-2012; Soler, Paul/E-8464-2011; Moorhead, Gareth/B-6634-2009

Autori interni:	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, VINCENZO 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, CHIARA MARIA ANGELA 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. mostra contributor esterni nascondi contributor esterni
Autori:	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
Titolo:	Search for heavy neutrinos mixing with tau neutrinos
Anno del prodotto:	2001
Digital Object Identifier (DOI):	10.1016/S0370-2693(01)00362-8
Appare nelle tipologie:	1.1 Articolo in rivista

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