pi. /sup 0/ and eta decays into lepton pairs

Journal Article · Wed Dec 01 04:00:00 EST 1982 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.26.3302· OSTI ID:6791018

Tupper, G B; Samuel, M A

A model for the rare decays of the neutral pseudoscalar mesons into lepton pairs is presented. By using a once-subtracted dispersion relation for the amplitude, we are able to obtain form-factor-insensitive results. The calculated branching ratios are GAMMA(..pi../sup 0/..-->..e/sup +/e/sup -/)/GAMMA(..pi../sup 0/..-->..all) = 2.0 x 10/sup -7/ and GAMMA(eta..--> mu../sup +/..mu../sup -/)/GAMMA(eta..-->..all) = 6.1 x 10/sup -7/, in excellent agreement with experiment. We also predict the branching ratio for eta..-->..e/sup +/e/sup -/ to be 9.1 x 10/sup -9/. We suggest that this decay may be accessible to experiment.

• Research Organization: Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078
• OSTI ID: 6791018
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 26:11; 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
DECAY
DISPERSION RELATIONS
ELECTRONS
ELEMENTARY PARTICLES
ETA MESONS
FERMIONS
FORM FACTORS
HADRONS
INTERACTIONS
LEPTONIC DECAY
LEPTONS
MESONS
PARTICLE DECAY
PARTICLE PROPERTIES
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
WEAK INTERACTIONS
WEAK PARTICLE DECAY