A search for decays of heavy neutrinos

Bergsma, F.; Dorenbosch, J.; Jonker, M.; Nieuwenhuis, C.; Allaby, J. V.; Amaldi, U.; Barbiellini, G.; Barone, Luciano Maria; Berger, C.; Capone, Antonio; Flegel, W.; Lanceri, L.; Metcalf, M.; Panman, J.; Winter, K.; Abt, I.; Aspiazu, J.; Buesser, F. W.; Daumann, H.; Gall, P. D.; Niebergall, F.; Ranitzsch, K. H.; Schuett, P.; Staehelin, P.; Gorbunov, P.; Grigoriev, E.; Kaftanov, V.; Khovansky, V.; Rosanov, A.; Baroncelli, A.; Borgia, Bruno; Bosio, C.; Diemoz, M.; Dore, Ubaldo; Ferroni, Fernando; Longo, Egidio; Luminari, L.; Monacelli, P.; De Notaristefani, F.; Pistilli, P.; Santoni, C.; Tortora, L.; Valente, V.

doi:10.1016/0370-2693(83)90275-7

A search for heavy neutrinos was conducted in the neutrino beam produced by the 400 GeV proton beam-dump and in the 400 GeV wide-band neutrino beam at CERN. A heavy neutrino associated with the τ lepton was searched for in the beam-dump experiment. No assumption on the nature of heavy neutrinos was made in the wide-band beam experiment. A search was made for neutrinos decaying into two electrons and a light neutrino. Since no events were observed, an upper limit on the neutrino mixing angles as a function of the neutrino mass is derived.

A search for decays of heavy neutrinos / F., Bergsma; J., Dorenbosch; M., Jonker; C., Nieuwenhuis; J. V., Allaby; U., Amaldi; G., Barbiellini; Barone, Luciano Maria; C., Berger; Capone, Antonio; W., Flegel; L., Lanceri; M., Metcalf; J., Panman; K., Winter; I., Abt; J., Aspiazu; F. W., Buesser; H., Daumann; P. D., Gall; F., Niebergall; K. H., Ranitzsch; P., Schuett; P., Staehelin; P., Gorbunov; E., Grigoriev; V., Kaftanov; V., Khovansky; A., Rosanov; A., Baroncelli; Borgia, Bruno; C., Bosio; M., Diemoz; Dore, Ubaldo; Ferroni, Fernando; Longo, Egidio; L., Luminari; P., Monacelli; F., De Notaristefani; P., Pistilli; C., Santoni; L., Tortora; V., Valente. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 128:5(1983), pp. 361-366. [10.1016/0370-2693(83)90275-7]