An effective Lagrangian calculation of the semileptonic decay modes of the. tau. lepton

Journal Article · Fri Jul 20 04:00:00 EDT 1990 · Modern Physics Letters B; (USA)

OSTI ID:6587354

Braaten, E; Oakes, R J; Tse, S M ^[1]

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1. Dept. of Physics and Astronomy, Northwestern Univ., Evanston, IL (US)

The semileptonic decay rates of the {tau} lepton into final states containing up to three pseudoscalar mesons are calculated using a general low energy effective Lagrangian for pseudoscalar and vector mesons with U(3) {times} U(3) chiral symmetry. Symmetry breaking is taken into account in the meson masses and mixing angles. All of the coupling constants in the Lagrangian are determined empirically from vector meson decay data without additional ad hoc hypotheses such as vector meson dominance. The results compare well with the measured decay rates where data are available. No unexpectedly large branching fractions are found that might account for the missing decay modes of the {tau}.

• OSTI ID: 6587354
• Journal Information: Modern Physics Letters B; (USA), Journal Name: Modern Physics Letters B; (USA) Vol. 5:14; ISSN 0217-9849; ISSN MPLBE
• Country of Publication: United States
• Language: English

Related Subjects

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645204 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
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645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BRANCHING RATIO
CALCULATION METHODS
CHIRAL SYMMETRY
CONFIGURATION MIXING
COUPLING CONSTANTS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FINAL-STATE INTERACTIONS
HADRONS
HEAVY LEPTONS
INTERACTIONS
LAGRANGIAN FIELD THEORY
LEPTONS
LIE GROUPS
MESONS
PARTICLE DECAY
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
SEMILEPTONIC DECAY
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS
TAU PARTICLES
U GROUPS
U-3 GROUPS
VECTOR MESONS
WEAK PARTICLE DECAY