Leptoproduction of heavy quarks. II. a unified QCD formulation of charged and neutral current processes from fixed-target to collider energies

M. A.G. Aivazis, John C. Collins, Fredrick I. Olness, Wu Ki Tung

Research output: Contribution to journalArticle

401 Citations (Scopus)

Abstract

A unified QCD formulation of leptoproduction of massive quarks in charged current and neutral current processes is described. This involves adopting consistent factorization and renormalization schemes which encompass both vector-boson-gluon-fusion (flavor creation) and vector-boson-massive-quark- scattering (flavor excitation) production mechanisms. It provides a framework which is valid from the threshold for producing the massive quark (where gluon fusion is dominant) to the very high energy regime when the typical energy scale is much larger than the quark mass mQ (where the quark scattering should be prevalent). This approach effectively resums all large logarithms of the type [sln(2/mQ2)]n which limit the validity of existing fixed-order calculations to the region O(mQ). We show that the (massive) quark-scattering contribution (after subtraction of overlaps) is important in most parts of the (x,Q) plane except near the threshold region. We demonstrate that the factorization scale dependence of the structure functions calculated in this approach is substantially less than those obtained in the fixed-order calculations, as one would expect from a more consistent formulation.

Original languageEnglish (US)
Pages (from-to)3102-3118
Number of pages17
JournalPhysical Review D
Volume50
Issue number5
DOIs
StatePublished - Jan 1 1994

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neutral currents
quantum chromodynamics
quarks
formulations
factorization
energy
bosons
fusion
scattering
thresholds
logarithms
subtraction
excitation

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Aivazis, M. A.G. ; Collins, John C. ; Olness, Fredrick I. ; Tung, Wu Ki. / Leptoproduction of heavy quarks. II. a unified QCD formulation of charged and neutral current processes from fixed-target to collider energies. In: Physical Review D. 1994 ; Vol. 50, No. 5. pp. 3102-3118.
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Leptoproduction of heavy quarks. II. a unified QCD formulation of charged and neutral current processes from fixed-target to collider energies. / Aivazis, M. A.G.; Collins, John C.; Olness, Fredrick I.; Tung, Wu Ki.

In: Physical Review D, Vol. 50, No. 5, 01.01.1994, p. 3102-3118.

Research output: Contribution to journalArticle

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