Formation of spin-one mesons by photon-photon fusion

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

DOI:https://doi.org/10.1103/PhysRevD.38.1· OSTI ID:7193863

Aihara, H; Alston-Garnjost, M; Avery, R E; Barbaro-Galtieri, A; Barker, A R; Barnett, B A; Bauer, D A; Bay, A; Bengtsson, H; Bobbink, G J; others, and

We have observed the formation of two spin-one mesons in ..gamma gamma.. fusion reactions in which one photon was highly virtual. The first, consistent with being the J/sup P//sup C/ = 1/sup ++/ f/sub 1/(1285), was seen in the final state eta..pi../sup +/..pi../sup -/ (eta..--> gamma gamma..), as was the eta'(958). We have previously reported the observation of the second spin-one state, the X(1420), in the final state K/sup +- /K/sub S//sup 0/..pi../sup minus-or-plus/ (K/sub S//sup 0/..--> pi../sup +/..pi../sup -/). The formation of this state, which may be the f/sub 1/(1420) observed in hadronic interactions, is reanalyzed using a new model and more data. We consider whether the X(1420) could be the partner of the f/sub 1/(1285) in the J/sup P//sup C/ = 1/sup ++/ meson nonet. The ..gamma gamma../sup */ width of each resonance was determined in several Q/sup 2/ bins. Using a model due to Cahn with a rho form factor, we obtained for the coupling parameter Gamma-tilde/sub ..gamma..//sub ..gamma../(f/sub 1/(1285)) the value 2.4 +- 0.5 +- 0.5 keV.

• Research Organization: Lawrence Berkeley Laboratory, Berkeley, California 94720 University of California, Davis, California 95616 University of California Intercampus Institute for Research at Particle Accelerators, Stanford, California 94305 University of California, Los Angeles, California 90024 University of
• OSTI ID: 7193863
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 38:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
AXIAL VECTOR MESONS
BASIC INTERACTIONS
BOSONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ETA PRIME-958 MESONS
F1-1285 MESONS
F2-1410 MESONS
FORM FACTORS
HADRONS
INTERACTIONS
MASS FORMULAE
MESON RESONANCES
MESONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHOTON-PHOTON INTERACTIONS
PIONS
PIONS NEUTRAL
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUARKS
RESONANCE PARTICLES
SPIN
TENSOR MESONS
VIRTUAL PARTICLES