Vector-meson contributions to the processes. gamma. gamma. r arrow. pi. sup 0. pi. sup 0 ,. pi. sup +. pi. sup minus , K sub L r arrow. pi. sup 0. gamma. gamma. , and K sup + r arrow. pi. sup +. gamma. gamma

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.41.1531· OSTI ID:6916170

Ko, P ^[1]

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1. Enrico Fermi Institute Department of Physics, University of Chicago, Chicago, Illinois 60637 (USA)

We implement standard chiral perturbation theory to {ital O}({ital p}{sup 4}) by adding vector mesons. We show that it leads to a good agreement of the prediction for {sigma}({gamma}{gamma}{r arrow}{pi}{sup 0}{pi}{sup 0}) with experiments and the vector mesons unitarize the chiral amplitude in an effective way. We also consider {ital K}{sub {ital L}}{r arrow}{pi}{sup 0}{gamma}{gamma}, including the effect of vector mesons, and obtain a very distinct spectrum for two photons. Also, their effects on {gamma}{gamma}{r arrow}{pi}{sup +}{pi}{sup {minus}} and {ital K}{sup +}{r arrow}{pi}{sup +}{gamma}{gamma} are briefly discussed.

• DOE Contract Number: AC02-80ER10587
• OSTI ID: 6916170
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 41:5; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
CHIRAL SYMMETRY
COUPLING
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FIELD THEORIES
FUNCTIONS
HADRONS
INTERACTIONS
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
KAONS PLUS
LAGRANGIAN FUNCTION
MESONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PERTURBATION THEORY
PHOTON-PHOTON INTERACTIONS
PIONS
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RADIATIVE DECAY
STRANGE MESONS
STRANGE PARTICLES
SYMMETRY
VECTOR MESONS