A search for decays of heavy neutrinos
Creators
- Bergsma, F.1
- Dorenbosch, J.1
- Jonker, M.1
- Nieuwenhuis, C.1
- Allaby, J.V.2
- Amaldi, U.2
- Barbiellini, G.2
- Barone, L.2
- Berger, C.2
- Capone, A.2
- Flegel, W.2
- Lanceri, L.2
- Metcalf, M.2
- Panman, J.2
- Winter, K.2
- Abt, I.3
- Aspiazu, J.3
- Buesser, F.W.3
- Daumann, H.3
- Gall, P.D.3
- Niebergall, F.3
- Ranitzsch, K.H.3
- Schuett, P.3
- Staehelin, P.3
- Gorbunov, P.4
- Grigoriev, E.4
- Kaftanov, V.4
- Khovansky, V.4
- Rosanov, A.4
- Baroncelli, A.5, 6, 7
- Bosio, C.5, 6, 7
- Santoni, C.5, 6, 7
- Tortora, L.5, 6, 7
- Borgia, B.7, 8
- Diemoz, M.7, 8
- Dore, U.7, 8
- Ferroni, F.7, 8
- Longo, E.7, 8
- Luminari, L.7, 8
- Monacelli, P.7, 8
- Notaristefani, F. de7, 8
- Pistilli, P.7, 8
- Valente, V.9, 7
- 1. Nationaal Inst. voor Kernfysica en Hoge-Energiefysica (NIKHEF), Amsterdam (Netherlands)
- 2. European Organization for Nuclear Research, Geneva (Switzerland)
- 3. Hamburg Univ. (Germany, F.R.). 2. Inst. fuer Experimentalphysik
- 4. AN SSSR, Moscow. Inst. Teoreticheskoj i Ehksperimental'noj Fiziki
- 5. Maryland Univ., College Park (USA). Engineering Materials Group
- 6. Istituto Nazionale di Fisica Nucleare, Rome (Italy). Ist. Superiore di Sanita
- 7. Istituto Nazionale di Fisica Nucleare, Rome (Italy)
- 8. Rome Univ. (Italy). Ist. di Fisica
- 9. Istituto Nazionale di Fisica Nucleare, Frascati (Italy). Lab. Nazionale di Frascati
Description
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 tau 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. The beam-dump experiment is sensitive to a neutrino mass range of 10-250 MeV and an upper limit at 90% confidende level on the square of the neutrino mixing angle of approx.=10-10 was obtained for neutrino masses greater than 180 MeV. The wide-band neutrino experiment is sensitive to neutrinos with a mass in a larger range (10-490 MeV), and for masses greater than 250 MeV yields an upper limit on the square of the neutrino mixing angle of approx.= 10-6. (orig.)
Additional details
Publishing Information
- Journal Title
- Phys. Lett., B
- Journal Volume
- 128
- Journal Issue
- 5
- Series
- CODEN: PYLBA.;Phys. Lett., B.
- Journal Page Range
- 361-366
- ISSN
- 0370-2693
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 15004817
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- GEV RANGE 100-1000; INCLUSIVE INTERACTIONS; LEPTONIC DECAY; LIMITING VALUES; MIXING RATIO; NUCLEON-NUCLEON INTERACTIONS; PARTICLE PRODUCTION; REST MASS; TAU NEUTRINOS; TAU PARTICLES
- Descriptors DEC
- BARYON-BARYON INTERACTIONS; BASIC INTERACTIONS; DECAY; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRON-HADRON INTERACTIONS; HEAVY LEPTONS; INTERACTIONS; LEPTONS; MASS; MASSLESS PARTICLES; NEUTRINOS; PARTICLE DECAY; PARTICLE INTERACTIONS; POSTULATED PARTICLES; WEAK INTERACTIONS; WEAK PARTICLE DECAY