Heavy quarks and QCD in [ital e][sup +][ital e][sup [minus]] collisions
Conference
·
· AIP Conference Proceedings (American Institute of Physics); (United States)
OSTI ID:5473695
- II. Institute fuer Experimentalphysik der Universitaet Hamburg and DESY, Notkestrasse 85, D-2000 Hamburg 52 (Germany)
Recent investigations of QCD aspects of heavy quark events in [ital e][sup +][ital e][sup [minus]] collisions are presented. Using three jet fractions in these events the flavor independence of the coupling constant of QCD, [alpha][sub [ital s]], is verified: [alpha][sup [ital b]][sub [ital s]]/[alpha][sup [ital udsc]][sub [ital s]]=1.01[plus minus]0.03[plus minus]0.03. The average scaled energy of charmed and bottom hadrons in decays of the Z[sup 0] is determined. Comparing these results with measurements at lower energies clear evidence for scaling violation is established. Studies of the shape of the fragmentation function do not yet allow a significant discrimination between different theoretical models. A study of the differences between quark and gluon jets performed in a model independent way establishes, that gluon jets are softer and broader compared to quark jets in the same environment.
- OSTI ID:
- 5473695
- Report Number(s):
- CONF-920837--
- Conference Information:
- Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 272:1
- Country of Publication:
- United States
- Language:
- English
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·
OSTI ID:6279792
Related Subjects
662230 -- Quantum Chromodynamics-- (1992-)
662310* -- Weak & Electromagnetic Interactions of Leptons-- (1992-)
662340 -- Hadron Interactions-- (1992-)
662380 -- Decays of Intermediate Bosons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
COMPOSITE MODELS
COUPLING CONSTANTS
DECAY
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FRAGMENTATION
GLUONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
JET MODEL
LEP STORAGE RINGS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
MULTIPLICITY
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
SCALING LAWS
STORAGE RINGS
Z NEUTRAL BOSONS
662310* -- Weak & Electromagnetic Interactions of Leptons-- (1992-)
662340 -- Hadron Interactions-- (1992-)
662380 -- Decays of Intermediate Bosons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
COMPOSITE MODELS
COUPLING CONSTANTS
DECAY
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FRAGMENTATION
GLUONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
JET MODEL
LEP STORAGE RINGS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
MULTIPLICITY
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
SCALING LAWS
STORAGE RINGS
Z NEUTRAL BOSONS