Total and jet photoproduction cross sections at DESY HERA and Fermilab energies

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.44.R10· OSTI ID:5522401

Gandhi, R; Sarcevic, I ^[1]

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1. Department of Physics, University of Arizona, Tucson, Arizona 85721 (US)

We present results of calculations of the total and jet photon-proton cross sections at energies of relevance to the Fermilab E683 experiment and the ZEUS and H-1 experiments at the DESY {ital ep} collider HERA. The calculations take into account the high-energy QCD structure of the photon and are performed for two different photon structure functions. We discuss how these forthcoming experiments may be able to provide important information on two major uncertainties inherent to the calculation of photoproduction cross sections in particular and in a more general context, to the nature of strong interactions. If the total photoproduction cross section is measured at E683 energies ({radical}{ital s} =16--28 GeV), it will provide a firmer value for {ital p}{sub {ital T}}{sup min}, the lower bound on the transverse momentum of outgoing jets, which signals the onset of hard scattering. At HERA energies ({radical}{ital s} up to 300 GeV), the total and jet cross sections will help determine the photon structure function better at low-{ital x} (the fractional parton momentum) values, currently a region where there are large uncertainties due to a lack of data.

• OSTI ID: 5522401
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Journal Issue: 1 Vol. 44:1; ISSN 0556-2821; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
COMPOSITE MODELS
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
FUNCTIONS
GEV RANGE
GEV RANGE 10-100
INTERACTIONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTON MODEL
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
PHOTON-PROTON INTERACTIONS
PHOTONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
STRUCTURE FUNCTIONS