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, A.; De Pedis, D.; Dore, U.; Frenkel-Rambaldi, A.; Loverre, P.F.; Macina, D.; Piredda, G.; Santacesaria, R.; Di Capua, E.; Ricciardi, S.; Saitta, B.; Akkus, Baki; Arik, E.; Serin-Zeyrek, M.; Sever, R.; Tolun, P.; Hiller, K.; Nahnhauer, R.; Roloff, H.E.

doi:10.1016/0370-2693(94)01422-9

SEARCH FOR HEAVY ISOSINGLET NEUTRINOS

Atıf İçin Kopyala

Vilain P., Wilquet G., Petrak S., Beyer R., Flegel W., Grote H., ...Daha Fazla

PHYSICS LETTERS B, cilt.343, ss.453-458, 1995 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 343
Basım Tarihi: 1995
Doi Numarası: 10.1016/0370-2693(94)01422-9
Dergi Adı: PHYSICS LETTERS B
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.453-458
İstanbul Üniversitesi Adresli: Evet

Özet

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 mu(+) mu(-) v(mu). 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 x 10(7) neutral-current neutrino events collected from 1987-1991. The experiment is sensitive to heavy neutrinos in the mass range 0.3-2.4 GeV/c(2). The best limit for the mixing parameter is \U-mu i\(2) < 3 X 10(-5) for a mass around 2 GeV/c(2). The analysis improved by an order of magnitude previous results derived from wide-band neutrino beam exposures of the CHARM detector.