Observation and study of the nu$_{mu}$e- --> nu$_{mu}$e- reaction in Gargamelle at high energy

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A search for the reaction nu /sub mu /+e/sup -/ to nu /sub mu /+e/sup -/ was made in the bubble chamber Gargamelle exposed to the wide- and neutrino beam of the CERN-SPS. Ten isolated e/sup -/ were found above 2 GeV energy. All of them were emitted at an angle smaller than 1.5 degrees with respect t...

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Detalles Bibliográficos
Autores principales: Alibran, P, Armenise, N, Bellotti, E, Blondel, A, Blum, D, Bonetti, S, Bonneaud, G R, Bourotte, J, Carnesecchi, G, Cavalli, D, Conforto, G, Degrange, B, Erriquez, O, Fiorini, Ettore, Fogli-Muciaccia, M T, Haguenauer, Maurice, Heusse, P, Gillespie, J, Jacquet, F, Lundborg, P, Lutz, A M, Matteuzzi, C, Musset, P, Natali, S, Nguyen-Khac, U, Nuzzo, S, Pascaud, C, Pattison, B, Pullia, Antonio, Rollier, M, Romano, F, Sleeman, J C, Vialle, J P, Willutzky, M, Zanotti, L
Lenguaje:eng
Publicado: 1978
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(78)90694-9
http://cds.cern.ch/record/132997
Descripción
Sumario:A search for the reaction nu /sub mu /+e/sup -/ to nu /sub mu /+e/sup -/ was made in the bubble chamber Gargamelle exposed to the wide- and neutrino beam of the CERN-SPS. Ten isolated e/sup -/ were found above 2 GeV energy. All of them were emitted at an angle smaller than 1.5 degrees with respect to the beam. The background is 0.2+or-0.2 events. Results on cross section are given in terms of vector and axial vector coupling constants. A comparison is made with the standard SU(2)(X)U (1) model: no agreement is found with the currently accepted value of the mixing angle. Possible sources other than the above reaction are discussed. (10 refs).

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