Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Quark and gluon decay functions in quantum chromodynamics and recombination model

Journal Article · · Phys. Rev., D; (United States)
;

Inclusive longitudinal-momentum distributions of pions in jets initiated by quarks and gluons are determined in perturbative quantum chromodynamics and the recombination model. The quark and antiquark joint distributions in jets are first calculated in the leading-order approximation at high Q/sup 2/. Gluons in the jets are completely converted to quark pairs. From the overall distribution, qq-bar pairs with definite quantum numbers then recombine to form pions. The recombination function for the process is well determined in the valon model. No adjustable parameters are involved in these calculations, and no data at low Q/sup 2/ are used as phenomenological input. The result for the quark decay functions can be compared with data on e/sup +/e/sup -/ annihilation, and the agreement is very good in both shape and normalization. Predictions for the gluon decay functions are presented, but they cannot yet be checked by experiments. The x and Q/sup 2/ depesndences of both type of decay functions have been parametrized in simple form suitable for use in theoretical and experimental applications.

Research Organization:
Institute of Theoretical Science and Department of Physics, University of Oregon, Eugene, Oregon 97403
OSTI ID:
6682279
Journal Information:
Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 23:3; ISSN PRVDA
Country of Publication:
United States
Language:
English

Similar Records

Quark and gluon decay functions in QCD and recombination model
Technical Report · Mon Mar 31 23:00:00 EST 1980 · OSTI ID:6678227
Some recent developments in the recombination model
Conference · Sun Dec 31 23:00:00 EST 1978 · OSTI ID:5641734
Constraints from jet calculus on quark recombination
Journal Article · Sat Jan 31 23:00:00 EST 1981 · Phys. Rev., D; (United States) · OSTI ID:6835420

Related Subjects

645201* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- General & Scattering Theory
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
DECAY
DISTRIBUTION FUNCTIONS
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FIELD THEORIES
FUNCTIONS
GLUONS
HADRONS
INCLUSIVE INTERACTIONS
INTERACTIONS
JET MODEL
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
MATHEMATICAL SPACE
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PERTURBATION THEORY
PHASE SPACE
PIONS
POSTULATED PARTICLES
PROBABILITY
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUANTUM NUMBERS
QUARKS
RECOMBINATION
SPACE