An upper limit to the cross section for the reaction nu /sub mu /e/sup -/ to nu /sub mu /e/sup -/ at SPS energies

Candidates for the purely leptonic process nu /sub mu /e/sup -/ to nu /sub mu /e/sup -/ have been searched for in the bubble chamber Gargamelle exposed to the CERN-SPS antineutrino wide-band beam. No single e/sup -/, of energy greater than 1 GeV, was found in a total of 230000 pictures, correspondin...

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Detalles Bibliográficos
Autores principales: Morfín, J G, Bertrand, D, Bertrand-Coremans, G, Blaes, R, Bullock, F W, De Unamuno, S, Dewit, M, Escoubés, B, Fett, E, Haatuft, A, Halsteinslid, A, Jones, T W, Myklebost, K, Olsen, J M, Petitjean, P, Pohl, M, Rahimi, F, Ratoff, P N, Sacton, J, Vilain, P, Weerts, H, Welch, L C
Lenguaje:eng
Publicado: 1979
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(79)90057-1
http://cds.cern.ch/record/875348
Descripción
Sumario:Candidates for the purely leptonic process nu /sub mu /e/sup -/ to nu /sub mu /e/sup -/ have been searched for in the bubble chamber Gargamelle exposed to the CERN-SPS antineutrino wide-band beam. No single e/sup -/, of energy greater than 1 GeV, was found in a total of 230000 pictures, corresponding to 7400 charged current events. This leads to an upper limit for the observed cross section of sigma /sub obs/<1.6*10/sup -42/(E/sub nu //GeV) cm/sup 2/ (90% C.L.). Interpretation of this value in terms of the standard Weinberg-Salam model yields an upper limit to the mixing parameter sin/sup 2/ theta /sub W/<0.39 at 90% C.L. (5 refs).

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