Observation of an excess of nu$_{e}$, n$\overline{u}_{e}$ events in a beam dump experiment at 400 GeV

A beam dump experiment has been performed at CERN in Gargammelle using the neutrino facility to look for penetrating particles produced either directly in the beam interaction or by prompt decay of new particles. A total of 32 interactions with a visible energy greater than 10 GeV has been found, cl...

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Detalles Bibliográficos
Autores principales: Alibran, P, Armenise, N, Arnold, R, Bartley, J H, Bellotti, E, Bertrand, D, Blaes, R, Blondel, A, Blum, D, Bolognese, T, Bonetti, S, Bonneaud, G R, Bourotte, J, Bullock, F W, Burmeister, H, Carnesecchi, G, Cavalli, D, Conforto, G, Degrange, B, Dewit, M, Erriquez, O, Escoubés, B, Fiorini, Ettore, Frodesen, A G, Gillespie, J, Haguenauer, Maurice, Heusse, P, Jacquet, F, Jones, T W, Lutz, A M, Matteuzzi, C, Morfín, J G, Muciaccia, M T, Musset, P, Natali, S, Nguyen-Khac, U, Nuzzo, S, Pascaud, C, Pattison, B, Paty, M, Petitjean, P, Price, M, Pullia, Antonio, Riester, J L, Rognebakke, A, Rollier, M, Romano, F, Sacton, J, Skjeggestad, O, Sleeman, J C, Van Doninck, W K, Vialle, J P, Weerts, H, Welch, L, Willutzky, M, Zanotti, L
Lenguaje:eng
Publicado: 1978
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(78)90079-5
http://cds.cern.ch/record/132939
Descripción
Sumario:A beam dump experiment has been performed at CERN in Gargammelle using the neutrino facility to look for penetrating particles produced either directly in the beam interaction or by prompt decay of new particles. A total of 32 interactions with a visible energy greater than 10 GeV has been found, classified, after corrections, into 18 charged current nu /sub mu / or nu /sub mu /, 5.1 neutral current and 8.9 nu /sub e/ or nu /sub e/ charged current events. An excess of nu /sub e/ events remains after all subtractions from any established sources. Results are presented in terms of the product of the cross section and the leptonic decay branching ratio of the possible source. (11 refs).

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