rho/sup 0/. omega. production in photon photon interactions

Technical Report · Sat Aug 01 04:00:00 EDT 1987

DOI:https://doi.org/10.2172/6014878· OSTI ID:6014878

Derby, K A

The subject of this dissertation is the production of the rho/sup 0/..omega.. final state in photon photon interactions. The production of the rho/sup 0/..omega.. final state has been of interest primarily because of its similarity to the related process ..gamma gamma.. ..-->.. rho/sup 0/rho/sup 0/. The cross section for rho/sup 0/rho/sup 0/ production demonstrates a peaking near threshold, the mechanism of which has been the subject of considerable speculation. The data sample used for the analysis was obtained using the TPC detector facility at the PEP e/sup +/e/sup -/ storage ring, and corresponds to an integrated e/sup +/e/sup -/ luminosity of 64 pb/sup -1/ at 29 GeV center of mass energy. Our estimate of the rho/sup 0/..omega.. cross section is compared to the predictions of several models which have been used to account for the observed rho/sup 0/rho/sup 0/ cross section. The experimental results are consistent with the predictions of a threshold enhancement model, as well as those of a four quark (qq anti q anti q) resonance model. However, they disagree with the predictions of a t-channel factorization approach.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6014878
• Report Number(s): LBL-23548; ON: DE88000474
• 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
BASIC INTERACTIONS
BOSONS
COMPUTERIZED SIMULATION
CROSS SECTIONS
DATA
DEEP INELASTIC SCATTERING
DIAGRAMS
DRIFT CHAMBERS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FACTORIZATION
GAS TRACK DETECTORS
HADRONS
INELASTIC SCATTERING
INFORMATION
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MASS SPECTRA
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESONS
MULTIWIRE PROPORTIONAL CHAMBERS
NUMERICAL DATA
OMEGA-784 RESONANCES
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PATTERN RECOGNITION
PEP STORAGE RINGS
PHOTON-PHOTON INTERACTIONS
PHOTOPRODUCTION
PIONS
PROJECTION SPARK CHAMBERS
PROPORTIONAL COUNTERS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
RHO-765 RESONANCES
SCATTERING
SCATTERPLOTS
SHOWER COUNTERS
SIMULATION
SPARK CHAMBERS
SPECTRA
STORAGE RINGS
VECTOR DOMINANCE MODEL