Measurement of the branching ratio and polarization for J/psi. --> gamma. f(1270)
Journal Article
·
· Phys. Rev. D; (United States)
The decay J/psi..--> gamma..f(1270), f(1270)..--> pi../sup 0/..pi../sup 0/ has been studied. The ..gamma..f decay branching ratio is measured to be (1.48 +- 0.25 +- 0.30) x 10/sup -3/. A fit to the f production and decay angular distributions yields the values A/sub 1//A/sub 0/ = 0.88 +- 0.13 and A/sub 2//A/sub 0/ = 0.04 +- 0.19, where A/sub lambda/ are the f helicity amplitudes. These results disagree with the values predicted from a QCD two-gluon-exchange model.
- Research Organization:
- Physics Department, California Institute of Technology, Pasadena, California 91125
- DOE Contract Number:
- AC03-76SF00515; AC02-76ER03064; AC03-81ER40050; AC02-76ER03072
- OSTI ID:
- 5231815
- Journal Information:
- Phys. Rev. D; (United States), Vol. 25:11
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PSI RESONANCES
BRANCHING RATIO
RADIATIVE DECAY
ANGULAR DISTRIBUTION
EXCHANGE INTERACTIONS
F-1260 RESONANCES
GLUONS
HELICITY
PARTICLE PRODUCTION
PIONS NEUTRAL
POLARIZATION
QUANTUM CHROMODYNAMICS
SPEAR
BOSONS
DECAY
DISTRIBUTION
ELECTROMAGNETIC PARTICLE DECAY
ELEMENTARY PARTICLES
FIELD THEORIES
HADRONS
INTERACTIONS
MESON RESONANCES
MESONS
PARTICLE DECAY
PARTICLE PROPERTIES
PIONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
RESONANCE PARTICLES
STORAGE RINGS
TENSOR MESONS
VECTOR MESONS
WEAK PARTICLE DECAY
645102* - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties
645400 - High Energy Physics- Field Theory
PSI RESONANCES
BRANCHING RATIO
RADIATIVE DECAY
ANGULAR DISTRIBUTION
EXCHANGE INTERACTIONS
F-1260 RESONANCES
GLUONS
HELICITY
PARTICLE PRODUCTION
PIONS NEUTRAL
POLARIZATION
QUANTUM CHROMODYNAMICS
SPEAR
BOSONS
DECAY
DISTRIBUTION
ELECTROMAGNETIC PARTICLE DECAY
ELEMENTARY PARTICLES
FIELD THEORIES
HADRONS
INTERACTIONS
MESON RESONANCES
MESONS
PARTICLE DECAY
PARTICLE PROPERTIES
PIONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
RESONANCE PARTICLES
STORAGE RINGS
TENSOR MESONS
VECTOR MESONS
WEAK PARTICLE DECAY
645102* - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties
645400 - High Energy Physics- Field Theory