Chiral anomalies and effective vector meson Lagrangian beyond the tree level

Journal Article · Tue Dec 01 04:00:00 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), Journal Name: Mod. Phys. Lett. A; (United States) Vol. 2:12; ISSN MPLAE
• Country of Publication: United States
• Language: English

Related Subjects

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