Parton distributions at small x

Journal Article · Fri Nov 30 23:00:00 EST 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.42.3645· OSTI ID:6044883

Kwiecinski, J; Martin, A D; Stirling, W J ^[1]; Roberts, R G ^[2]

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1. Department of Physics, University of Durham (United Kingdom)
2. Rutherford Appleton Laboratory, Chilton, Didcot (United Kingdom)

We perform a next-to-leading-order QCD analysis of the recent data for deep-inelastic lepton-nucleon scattering and related processes, in which we pay particular attention to the forms of the parton distributions at very small {ital x}. We discuss in detail, and we incorporate in the analysis, the theoretical QCD results leading to the singular {ital x}{sup {minus}1/2}-type behavior of the gluon and sea-quark distributions, as well as the modifications due to shadowing effects. We find the QCD shadowing corrections are significant for {ital x}{approx lt}10{sup {minus}3} even though the parton distributions are below their saturation limit. We give predictions for the structure functions {ital F}{sub 2} and {ital F}{sub {ital L}} accessible at the DESY {ital ep} collider HERA, and for {ital W} and {ital Z} production up to the energies of the CERN Large Hadron Collider and the Superconducting Super Collider. We discuss the possibility of experiments at these colliders probing the parton distributions in the very-small-{ital x} region.

• OSTI ID: 6044883
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 42:11; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BOSONS
CYCLIC ACCELERATORS
DEEP INELASTIC SCATTERING
DESY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FUNCTIONS
GLUONS
HERA STORAGE RING
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTONS
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
SCATTERING
STORAGE RINGS
STRUCTURE FUNCTIONS
SUPERCONDUCTING SUPER COLLIDER
SYNCHROTRONS