Measurement of the pi. -->. e. nu. branching ratio

Journal Article · Sat Mar 01 04:00:00 EST 1986 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.33.1211· OSTI ID:6099269

Bryman, D A; Dubois, R; Macdonald, J A; Numao, T; Olaniyi, B; Olin, A; Poutissou, J; Dixit, M S

A measurement of the ..pi -->..e..nu.. branching ratio using a NaI(Tl) spectrometer yields a value GAMMA((..pi -->..e..nu..)+(..pi -->..e..nu gamma..))/ GAMMA((..pi --> mu nu..)+(..pi --> mu nu gamma..)) = (1. 218 +- 0.014) x 10/sup -4/. The result is consistent with expectations of the standard electroweak theory incorporating electron-muon universality.

• Research Organization: TRIUMF, Vancouver, British Columbia, Canada V6T 2A3
• OSTI ID: 6099269
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 33:5; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
CORRECTIONS
CP INVARIANCE
DECAY
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GAUGE INVARIANCE
HADRONS
HELICITY
INTERACTIONS
INVARIANCE PRINCIPLES
LEPTONIC DECAY
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MESONS
NEUTRINOS
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PROPERTIES
PIONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUARKS
RADIATIVE CORRECTIONS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
WEAK INTERACTIONS
WEAK PARTICLE DECAY
WEINBERG-SALAM GAUGE MODEL