Improved search for massive neutrinos in. pi. sup + r arrow e sup +. nu. decay

Journal Article · Sat Aug 01 04:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.R885· OSTI ID:7183717

Britton, D I; Ahmad, S; Bryman, D A; Burnham, R A; Clifford, E T.H.; Kitching, P; Kuno, Y; Macdonald, J A; Numao, T; Olin, A; Poutissou, J ^[1]; Dixit, M S ^[2]

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1. TRIUMF, Vancouver, British Columbia, V6T 2A3 (Canada)
2. Center for Research in Particle Physics, Carleton University, Ottawa, K1S 5B6 (Canada)

Evidence of massive neutrinos was sought in the {pi}{sup +}{r arrow}{ital e}{sup +}{nu} decay spectrum with the background from the {pi}{r arrow}{mu}{r arrow}{ital e} decay chain highly suppressed. Upper limits (90% C.L.) were set on the neutrino mixing parameter {vert bar}{ital U}{sub {ital e}{ital i}}{vert bar}{sup 2}{lt}10{sup {minus}7} in the mass region 50{lt}{ital m}{sub {nu}}{lt}130 MeV/{ital c}{sup 2}.

• OSTI ID: 7183717
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:3; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662350* -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
CYCLIC ACCELERATORS
CYCLOTRONS
DECAY
EIGENSTATES
ELEMENTARY PARTICLES
ENERGY SPECTRA
FERMIONS
HADRONS
HELICITY
INTERACTIONS
ISOCHRONOUS CYCLOTRONS
LEPTONIC DECAY
LEPTONS
MASS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATTER
MEASURING INSTRUMENTS
MESONS
NEUTRINOS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PIONS
PIONS PLUS
POSITRONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SCINTILLATION COUNTERS
SPECTRA
STANDARD MODEL
TRIUMF CYCLOTRON
UNIFIED GAUGE MODELS
WEAK INTERACTIONS
WEAK PARTICLE DECAY