skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Tests of quantum chromodynamics in two-photon collisions and high-p/sub T/ photon production

Abstract

We use the diagrammatic approach to scale breaking to rederive the results of the renormalization-group approach to two-photon, ..gamma..*..gamma.., collisions, where one of the photons is highly virtual and the other nearly real. In an axial gauge only ladder diagrams contribute to leading-logarithmic accuracy. When interpreted in terms of the quark distribution of the real photon we obtain the result G/sub q//..gamma..(q/sup 2/,x) = (..cap alpha../..cap alpha../sub s/(q/sup 2/))f/sub q/(x) + O (1), where f/sub q/(x) is an exactly calculable scaling function. By virtue of the fact that only ladder diagrams contribute in leading-logarithmic accuracy for this and other short-distance photon-target probes, we find that this form for G/sub q//..gamma.. can be employed (to leading-logarithmic accuracy) in any short-distance application involving a photon target. We give a summary of these additional applications with emphasis on high-transverse-momentum phenomena. We present also estimates of the vector-dominance background to the pointlike component of the photon distribution function. In addition we present a convenient summary of leading-logarithmic quantum-chromodynamic corrections including dominant x ..-->.. 1 behaviors.

Authors:
;
Publication Date:
Research Org.:
University of California, San Diego, La Jolla, California 92093
OSTI Identifier:
6091622
Resource Type:
Journal Article
Journal Name:
Phys. Rev., D; (United States)
Additional Journal Information:
Journal Volume: 20:1
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PHOTON-PHOTON INTERACTIONS; SCALING LAWS; QUANTUM CHROMODYNAMICS; COUPLING CONSTANTS; DEEP INELASTIC SCATTERING; GLUON MODEL; LADDER APPROXIMATION; PARTICLE PRODUCTION; QUARKS; RENORMALIZATION; STRUCTURE FUNCTIONS; TRANSVERSE MOMENTUM; BASIC INTERACTIONS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; FIELD THEORIES; FUNCTIONS; INELASTIC SCATTERING; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; LINEAR MOMENTUM; MATHEMATICAL MODELS; PARTICLE INTERACTIONS; PARTICLE MODELS; POSTULATED PARTICLES; QUANTUM FIELD THEORY; SCATTERING; 645202* - High Energy Physics- Particle Interactions & Properties-Theoretical- Electromagnetic Interactions & Properties; 645400 - High Energy Physics- Field Theory

Citation Formats

Frazer, W.R., and Gunion, J.F. Tests of quantum chromodynamics in two-photon collisions and high-p/sub T/ photon production. United States: N. p., 1979. Web. doi:10.1103/PhysRevD.20.147.
Frazer, W.R., & Gunion, J.F. Tests of quantum chromodynamics in two-photon collisions and high-p/sub T/ photon production. United States. doi:10.1103/PhysRevD.20.147.
Frazer, W.R., and Gunion, J.F. Sun . "Tests of quantum chromodynamics in two-photon collisions and high-p/sub T/ photon production". United States. doi:10.1103/PhysRevD.20.147.
@article{osti_6091622,
title = {Tests of quantum chromodynamics in two-photon collisions and high-p/sub T/ photon production},
author = {Frazer, W.R. and Gunion, J.F.},
abstractNote = {We use the diagrammatic approach to scale breaking to rederive the results of the renormalization-group approach to two-photon, ..gamma..*..gamma.., collisions, where one of the photons is highly virtual and the other nearly real. In an axial gauge only ladder diagrams contribute to leading-logarithmic accuracy. When interpreted in terms of the quark distribution of the real photon we obtain the result G/sub q//..gamma..(q/sup 2/,x) = (..cap alpha../..cap alpha../sub s/(q/sup 2/))f/sub q/(x) + O (1), where f/sub q/(x) is an exactly calculable scaling function. By virtue of the fact that only ladder diagrams contribute in leading-logarithmic accuracy for this and other short-distance photon-target probes, we find that this form for G/sub q//..gamma.. can be employed (to leading-logarithmic accuracy) in any short-distance application involving a photon target. We give a summary of these additional applications with emphasis on high-transverse-momentum phenomena. We present also estimates of the vector-dominance background to the pointlike component of the photon distribution function. In addition we present a convenient summary of leading-logarithmic quantum-chromodynamic corrections including dominant x ..-->.. 1 behaviors.},
doi = {10.1103/PhysRevD.20.147},
journal = {Phys. Rev., D; (United States)},
number = ,
volume = 20:1,
place = {United States},
year = {1979},
month = {7}
}