Chiral-symmetry-breaking corrections in two-photon decays of pseudoscalar mesons

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.37.149· OSTI ID:5584107

Riazuddin,; Fayyazuddin,

Chiral-symmetry-breaking corrections of order m/sub P//sup 2//m/sub V//sup 2/ to the main effect which arises from the axial-vector anomaly in ..pi../sup 0/, eta/sup 0/, and eta'/sup 0/..-->..2..gamma.. decays are estimated by using gauge invariance and vector-meson dominance, which holds at about the 25% level. The inclusion of these corrections requires a large eta-eta' mixing angleapprox. =-(25 +- 4)/sup 0/ and substantial violation of nonet symmetry for F/sub 8/ and F/sub 0/, the axial-vector decay constants for eta/sub 8/ and eta/sub 0/.

• Research Organization: Department of Physics, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
• OSTI ID: 5584107
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 37:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645300 -- High Energy Physics-- Particle Invariance Principles & Symmetries
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
AXIAL-VECTOR CURRENTS
BOSONS
CHIRAL SYMMETRY
CURRENT ALGEBRA
CURRENTS
ELEMENTARY PARTICLES
ETA MESONS
FIELD THEORIES
GAUGE INVARIANCE
HADRONS
INVARIANCE PRINCIPLES
LIE GROUPS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATRIX ELEMENTS
MESONS
PARTICLE MODELS
PHOTONS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RADIATIVE DECAY
SU GROUPS
SU-3 GROUPS
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS
VECTOR DOMINANCE MODEL
VECTOR MESONS