Soft-momentum quark-model predictions for the pseudoscalar-meson decays into lepton pairs

Journal Article · Thu Mar 01 04:00:00 EST 1984 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.29.911· OSTI ID:5016004

Scadron, M D; Visinescu, M

The pseudoscalar decays P..-->..l/sup +/l/sup -/ are driven by second-order electromagnetic loop diagrams which are rendered finite by use of appropriate off-shell P..--> gamma gamma.. form factors determined in the quark model. The theoretical predictions using the soft-momentum limit are in reasonable agreement with the experimental rates and branching ratios, the latter being approximately twice the unitarity bounds for the decays ..pi../sup 0/..-->..e/sup +/e/sup -/, eta..--> mu../sup +/..mu../sup -/, and K/sub L//sup 0/..--> mu../sup +/..mu../sup -/. We also investigate the radiative decays ..pi../sup 0/..-->..e/sup +/e/sup -/..gamma.. and eta..--> mu../sup +/..mu../sup -/..gamma.. in the same model, and deduce that one cannot extract unambiguously the constituent quark masses from the experimental data.

• Research Organization: Physics Department, University of Arizona, Tucson, Arizona 85721
• OSTI ID: 5016004
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 29:5; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
COLOR MODEL
COMPOSITE MODELS
DECAY
ELECTROMAGNETIC FORM FACTORS
ELEMENTARY PARTICLES
ETA MESONS
FORM FACTORS
HADRONS
INTERACTIONS
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
LEPTONIC DECAY
MATHEMATICAL MODELS
MESONS
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PROPERTIES
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
QUARK MODEL
RADIATIVE DECAY
STRANGE PARTICLES
WEAK INTERACTIONS
WEAK PARTICLE DECAY