Chiral anomalies and effective vector meson Lagrangian beyond the tree level

Journal Article · Tue Dec 01 00:00:00 EST 1987 · Mod. Phys. Lett. A; (United States)

DOI:https://doi.org/10.1142/S0217732387001245· OSTI ID:5053229

Dominguez, C A

The decays ..pi../sup O/ ..-->.. ..gamma gamma.., rho ..-->.. ..pi gamma.., ..omega.. ..-->.. ..pi gamma.., ..omega.. ..-->.. 3..pi.. and ..gamma.. ..-->.. 3..pi.. are studied in the framework of the chiral invariant effective Vector Meson Lagrangian beyond the tree level. The standard Lagrangian is enlarged by including an infinite number of radial excitations which are summed according to the dual model. As a result tree level diagrams are modified by a universal form factor at each vertex containing off-mass-shell mesons, but still respecting chiral anomaly low energy theorems. These vertex corrections bring the tree level predictions into better agreement with experiment. The presence of the ..omega.. ..-->.. 3..pi.. contact term is confirmed but its strength is considerably smaller than at tree level.

• Research Organization: Facultad de Fisica, Pontificia Universidad Catolica de Chile, Santiago (CL)
• OSTI ID: 5053229
• Journal Information: Mod. Phys. Lett. A; (United States), Vol. 2:12
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
LAGRANGE EQUATIONS
CHIRAL SYMMETRY
CHIRALITY
VECTOR MESONS
HADRONIC PARTICLE DECAY
MESON REACTIONS
FEYNMAN DIAGRAM
RADIATIVE CORRECTIONS
BOSONS
CHARGED-PARTICLE REACTIONS
CORRECTIONS
DECAY
DIAGRAMS
DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
EQUATIONS
HADRON REACTIONS
HADRONS
MESONS
NUCLEAR REACTIONS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE DECAY
PARTICLE PROPERTIES
SYMMETRY
645204* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties