Central and diffractive components of charm production

Journal Article · Fri Jan 01 04:00:00 EST 1982 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.25.112· OSTI ID:5848010

Barger, V; Halzen, F; Keung, W Y

To O(..cap alpha../sub s//sup ts2/) in perturbative QCD one can identify two separate components in the production of heavy flavors such as charm: central qq-bar..-->..cc-bar, gg..-->..cc-bar and diffractive qc..-->..qc, gc..-->..gc. For diffractive production, QCD evolution is the source of charm quarks inside the colliding hadrons. With an estimated 0.5% charm momentum fraction at Q/sup 2/approx. =4m/sub c//sup ts2/ from QCD evolution, a hard x distribution of charm, and a resolution cutoff on gluon-exchange contributions, the diffractive component reproduces the ..lambda../sub c//sup +/ and D cross sections observed at intermediate to large longitudinal x, both at Fermilab and at CERN ISR energies. The diffractive component also contributes to charm production near x/sub L/ = 0. This explains the failures of previous analyses, based on annihilation diagrams alone, to account for the observed charm cross section in the central region. Estimates are made of cross sections and x/sub L/ dependences of b- and t-quark production up to p-barp collider energies.

• Research Organization: Physics Department, University of Wisconsin: Madison, Madison, Wisconsin 53706
• OSTI ID: 5848010
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 25:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645201* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- General & Scattering Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHARM PARTICLES
COMPOSITE MODELS
CROSS SECTIONS
DIFFRACTION MODELS
ELEMENTARY PARTICLES
FIELD THEORIES
FLAVOR MODEL
GLUONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
MATHEMATICAL MODELS
MATHEMATICAL SPACE
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PERTURBATION THEORY
PHASE SPACE
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
SPACE