Search for heavy isosinglet neutrinos

Vilain, P.; Wilquet, G.; Petrak, S.; Beyer, R.; Flegel, W.; Grote, H.; Mouthuy, T.; Øveras, H.; Panman, J.; Winter, K.; Zacek, G.; Zacek, V.; Büsser, F. W.; Foos, C.; Gerland, L.; Layda, T.; Niebergall, F.; Rädel, G.; Stähelin, P.; Voss, T.; Favart, D.; Grégoire, G.; Knoops, E.; Lemaître, V.; Gorbunov, P.; Grigoriev, E.; Khovansky, V.; Maslennikov, A.; Rozanov, A.; Lippich, W.; Nathaniel, A.; Staude, A.; Vogt, J.; Cocco, A. G.; Ereditato, A.; Fiorillo, G.; Marchetti Stasi, F.; Palladino, V.; Strolin, P.; Capone, Antonio; de Pedis, D.; Dore, Ubaldo; Frenkel Rambaldi, A.; Loverre, Pier Ferruccio; Macina, D.; Piredda, G.; Santacesaria, R.; di Capua, E.; Ricciardi, S.; Saitta, B.; Akkus, B.; Arik, E.; Serin Zeyrek, M.; Sever, R.; Tolun, P.; Hiller, K.; Nahnhauer, R.; Roloff, H. E.

doi:10.1016/0370-2693(94)00440-I

A new search for decays of heavy isosinglet neutrinos produced by neutral-current neutrino interactions in the CERN wide-band neutrino beam has been conducted by the CHARM-II Collaboration. We searched for heavy neutrinos created by scattering muon neutrinos on nucleons and decaying into μ+μ-νμ. Production and decay of heavy neutrinos would appear as double events in the detector. Each double event candidate was tested wheather the measured quantities are compatible with the kinematics of this process. No event passed this test. The analysis is based on 2 × 107 neutral-current neutrino events collected from 1987-1991.

Search for heavy isosinglet neutrinos / Vilain, P.; Wilquet, G.; Petrak, S.; Beyer, R.; Flegel, W.; Grote, H.; Mouthuy, T.; Øveras, H.; Panman, J.; Winter, K.; Zacek, G.; Zacek, V.; Büsser, F. W.; Foos, C.; Gerland, L.; Layda, T.; Niebergall, F.; Rädel, G.; Stähelin, P.; Voss, T.; Favart, D.; Grégoire, G.; Knoops, E.; Lemaître, V.; Gorbunov, P.; Grigoriev, E.; Khovansky, V.; Maslennikov, A.; Rozanov, A.; Lippich, W.; Nathaniel, A.; Staude, A.; Vogt, J.; Cocco, A. G.; Ereditato, A.; Fiorillo, G.; Marchetti Stasi, F.; Palladino, V.; Strolin, P.; Capone, Antonio; de Pedis, D.; Dore, Ubaldo; Frenkel Rambaldi, A.; Loverre, Pier Ferruccio; Macina, D.; Piredda, G.; Santacesaria, R.; di Capua, E.; Ricciardi, S.; Saitta, B.; Akkus, B.; Arik, E.; Serin Zeyrek, M.; Sever, R.; Tolun, P.; Hiller, K.; Nahnhauer, R.; Roloff, H. E.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - B343:(1995), pp. 453-458. [10.1016/0370-2693(94)00440-I]