Charm production at the CERN proton-antiproton collider
Thesis/Dissertation
·
OSTI ID:5429989
Evidence for the production of charged D/sup */ mesons has been obtained in proton-antiproton collisions at center of mass energy 540 GeV with the UA1 detector at the CERN collider. The search was confined to the charged particle fragments of hadronic jets, which are expected to be predominantly gluon jets in this experiment. The observed D/sup */ decays were used to form a fragmentation distribution in the variable z, which is the fraction of the jet momentum carried by the D/sup */. This mean of this distribution is a z = 0.2, suggesting that the charm quark of the D/sup */ is not the initiator of the jet. The production rate of charged D/sup */ relative to jets was found to be 0.65 +/- 0.19 +/- 0.33. This large rate coupled with the soft fragmentation distribution, lead to the conclusion that the most likely source of the charm particles is the fragmentation of gluon jets into cc pairs. This result is probably reflective of the QCD prediction for flavor independence of gluon-quark couplings.
- Research Organization:
- California Univ., Riverside (USA)
- OSTI ID:
- 5429989
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BOSONS
CERN SPS SYNCHROTRON
CHARGED PARTICLES
CHARM PARTICLES
COMPOSITE MODELS
CYCLIC ACCELERATORS
D MESONS
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FIELD THEORIES
FLAVOR MODEL
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
JET MODEL
MATHEMATICAL MODELS
MESONS
MULTIPLE PRODUCTION
NUCLEON-ANTINUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PROTON-ANTIPROTON INTERACTIONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
SYNCHROTRONS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BOSONS
CERN SPS SYNCHROTRON
CHARGED PARTICLES
CHARM PARTICLES
COMPOSITE MODELS
CYCLIC ACCELERATORS
D MESONS
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FIELD THEORIES
FLAVOR MODEL
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
JET MODEL
MATHEMATICAL MODELS
MESONS
MULTIPLE PRODUCTION
NUCLEON-ANTINUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PROTON-ANTIPROTON INTERACTIONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
SYNCHROTRONS