Production of K/sup +/K/sup -/ and ppbar pairs in high energy photoproduction
Technical Report
·
OSTI ID:5822119
Using the Fermilab broad-band neutral beam and a multi-particle spectrometer, we have investigated the channels: photon + d..-->..K/sup + -/(ppbar) (n, p, d, or X). In K/sup +/K/sup -/ production, we make precise measurements of the elastic phi photoproduction cross section between 35 GeV and 85 GeV. Between these limits, we see the elastic cross section rise by 25%. At K/sup + -/ masses higher than the phi, we see an enhancement centered at 1.72 +- .02 GeV, with a width of .12 +- .05 GeV. We measure the cross section to be 8.0 +- 2.8 nb/nucleon, with an additional systematic error of 16%. Measurements are made of its production characteristics. The most probable interpretation of this state is a radial excitation of the phi, or phi-prime. Production of ppbar pairs is measured. The ppbar mass spectrum displays no obvious peaks, either in elastic or inelastic photoproduction. Limits are set for previously reported possible states in ppbar electroproduction, which are significantly below the reported cross sections. 57 refs.
- Research Organization:
- Illinois Univ., Urbana (USA). Dept. of Physics
- DOE Contract Number:
- AC02-76ER01195
- OSTI ID:
- 5822119
- Report Number(s):
- DOE/ER/01195-496; COO-1195-496; ON: DE85011214
- 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
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYONS
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
DATA
DIFFRACTION MODELS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 10-100
HADRONS
INFORMATION
INTERACTIONS
KAONS
KAONS MINUS
KAONS PLUS
MASS SPECTRA
MATHEMATICAL MODELS
MESON RESONANCES
MESONS
NUCLEI
NUCLEONS
NUMERICAL DATA
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PHI-1019 RESONANCES
PHOTON-DEUTERON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTOPRODUCTION
PROTONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
SCATTERING
SPECTRA
STRANGE PARTICLES
VECTOR DOMINANCE MODEL
VECTOR MESONS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYONS
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
DATA
DIFFRACTION MODELS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 10-100
HADRONS
INFORMATION
INTERACTIONS
KAONS
KAONS MINUS
KAONS PLUS
MASS SPECTRA
MATHEMATICAL MODELS
MESON RESONANCES
MESONS
NUCLEI
NUCLEONS
NUMERICAL DATA
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PHI-1019 RESONANCES
PHOTON-DEUTERON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTOPRODUCTION
PROTONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
SCATTERING
SPECTRA
STRANGE PARTICLES
VECTOR DOMINANCE MODEL
VECTOR MESONS