High-p/sub T/ production of direct photons and jets in quantum chromodynamics

Journal Article · Wed Oct 01 04:00:00 EDT 1980 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.22.1609· OSTI ID:5121291

Cormell, L; Owens, J F

The production of high-p/sub T/ direct photons is studied using quantum chromodynamics. The theoretical predictions are shown to be compatible with the existing data over the energy interval 20<..sqrt..s-bar<63 GeV. In addition, the possibility of using a high-p/sub T/ direct-photon trigger in hadronic-jet experiments is studied. By simultaneously triggering on a direct photon and on the away-side hadronic jet it is possible to obtain more precise information concerning the underlying dynamical subprocesses than if a two-jet trigger is used. In particular, one can, by using a combination of ..pi../sup + -/, p, and p-bar beams, measure both the pion quark and gluon distribution functions as well as the gluon distribution function for the proton. Furthermore, if particle identification is available for the away-side jet, one can separately measure various quark and gluon fragmentation functions. A method of measuring the Q/sup 2/ dependences of these various functions is also discussed.

• Research Organization: Physics Department, University of Pennsylvania, Philadelphia, Pennsylvania 19174
• OSTI ID: 5121291
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 22:7; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions &amp; Properties-Theoretical-- Electromagnetic Interactions &amp; Properties
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BEAMS
DISTRIBUTION FUNCTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
FRAGMENTATION
FUNCTIONS
GEV RANGE
GEV RANGE 10-100
GLUONS
JET MODEL
LINEAR MOMENTUM
MASSLESS PARTICLES
MATHEMATICAL MODELS
MESON BEAMS
NUCLEON BEAMS
PARTICLE BEAMS
PARTICLE IDENTIFICATION
PARTICLE MODELS
PARTICLE PRODUCTION
PARTONS
PHOTONS
PION BEAMS
POSTULATED PARTICLES
PROTON BEAMS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
TRANSVERSE MOMENTUM