Published December 28, 1989 | Version v1
Journal article Metadata-only

The gluon content of the pion from high-pt direct photon production

Creators

  • 1. Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules
  • 2. Fermi National Accelerator Lab., Batavia, IL (USA)
  • 3. Bielefeld Univ. (Germany, F.R.). Fakultaet fuer Physik
  • 4. Paris-11 Univ., 91 - Orsay (France). Lab. de Physique Theorique et Hautes Energies
  • 5. Geneva Univ. (Switzerland). Dept. de Physique Nucleaire et Corpusculaire
  • 6. Lausanne Univ. (Switzerland). Inst. de Physique Nucleaire

Description

A fit to the large pt direct photon cross-sections for the reactions π±p→γX, using complete beyond leading logarithm QCD expressions, allows the determination of the content of gluons and valence quarks inside the pion and defines the shape of the gluon structure function for x>0.2. The QCD scale parameter Λsub(anti Manti S) is in good agreement with the most precise deep inelastic scattering determinations. (orig.)

Additional details

Publishing Information

Journal Title
Physics Letters, (Section) B
Journal Volume
233
Journal Issue
3/4
Series
Phys. Lett., B.
Journal Page Range
517-521
ISSN
0370-2693
CODEN
PYLBA

INIS

Country of Publication
Netherlands
Country of Input or Organization
Netherlands
INIS RN
21029927
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
DEEP INELASTIC SCATTERING; GLUON MODEL; INCLUSIVE INTERACTIONS; LEPTON-MESON INTERACTIONS; PARTICLE STRUCTURE; PHOTONS; PION MINUS-PROTON INTERACTIONS; PION PLUS-PROTON INTERACTIONS; PION-PROTON INTERACTIONS; PIONS; QUANTUM CHROMODYNAMICS; SCALING LAWS; STRUCTURE FUNCTIONS; THEORETICAL DATA; TRANSVERSE MOMENTUM
Descriptors DEC
BOSONS; DATA; ELEMENTARY PARTICLES; FIELD THEORIES; FUNCTIONS; HADRON-HADRON INTERACTIONS; HADRONS; INELASTIC SCATTERING; INFORMATION; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; LINEAR MOMENTUM; MASSLESS PARTICLES; MATHEMATICAL MODELS; MESON-BARYON INTERACTIONS; MESON-NUCLEON INTERACTIONS; MESONS; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE MODELS; PION-NUCLEON INTERACTIONS; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; SCATTERING