Study of photoproduction of vector mesons on deuterium by 5. 5 GeV linearly polarized photons
The experimental results of a deuterium bubble chamber photoproduction study of half a million pictures at 5.5 GeV are presented. This experiment has been performed using a monoenergetic and linearly polarized photon beam facility at SLAC. At 5.5 GeV the beam polarization is greater than 90%, and the average FWHM of the beam energy spectrum is 0.6 GeV. The reaction ..gamma..d ..-->.. ..pi../sup +/..pi../sup -/d has been studied in detail. A clear sample of ..gamma..d ..-->.. rho/sup 0/d channel was obtained and from the rho/sup 0/ decay distribution in terms of an extended density matrix which includes correlation with the beam polarization, nine independent density matrix parameters were determined. The study of rho/sup 0/ production and decay in the reaction channel ..gamma..d ..-->.. rho/sup 0/d was found to proceed almost completely through natural parity exchanges; the contribution from unnatural parity exchanges being only (5.3 +- 4.5)% for momentum transfer absolute value t less than or equal to 0.25 GeV/sup 2/. For the rho/sup 0/ mass and width, the values (766 +- 5) and (139 +- 11) MeV, respectively were obtained. The rho/sup 0/ production cross section in this channel has been determined to be (9.1 +- 0.8) ..mu..b.
- Research Organization:
- California Univ., Riverside (USA)
- DOE Contract Number:
- AT03-76ER70197
- OSTI ID:
- 8149672
- Report Number(s):
- DOE/ER/70197-T2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BEAMS
BOSONS
CROSS SECTIONS
DATA
DEUTERIUM TARGET
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 01-10
HADRONS
INFORMATION
INTERACTIONS
MESON RESONANCES
MESONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTON-DEUTERON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTOPRODUCTION
PIONS
PIONS MINUS
PIONS PLUS
POLARIZED BEAMS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
RHO-765 RESONANCES
TARGETS
VECTOR MESONS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BEAMS
BOSONS
CROSS SECTIONS
DATA
DEUTERIUM TARGET
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 01-10
HADRONS
INFORMATION
INTERACTIONS
MESON RESONANCES
MESONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTON-DEUTERON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTOPRODUCTION
PIONS
PIONS MINUS
PIONS PLUS
POLARIZED BEAMS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
RHO-765 RESONANCES
TARGETS
VECTOR MESONS