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

Raj Gandhi, Ina Sarcevic

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

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 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 (s =1628 GeV), it will provide a firmer value for pTmin, the lower bound on the transverse momentum of outgoing jets, which signals the onset of hard scattering. At HERA energies (s up to 300 GeV), the total and jet cross sections will help determine the photon structure function better at low-x (the fractional parton momentum) values, currently a region where there are large uncertainties due to a lack of data.

Original languageEnglish (US)
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume44
Issue number1
DOIs
StatePublished - 1991

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photoproduction
cross sections
photons
energy
transverse momentum
partons
quantum chromodynamics
momentum
protons
scattering

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "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 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 (s =1628 GeV), it will provide a firmer value for pTmin, the lower bound on the transverse momentum of outgoing jets, which signals the onset of hard scattering. At HERA energies (s up to 300 GeV), the total and jet cross sections will help determine the photon structure function better at low-x (the fractional parton momentum) values, currently a region where there are large uncertainties due to a lack of data.",
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