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Title: Next-to-leading order versus quark off-shellness and intrinsic k{sub T} in the Drell-Yan process

Abstract

We calculate the effects of next-to-leading order perturbative QCD as well as of the quark transverse motion and off-shellness on the Drell-Yan process cross section. By studying the s{yields}{infinity} behavior of the cross section in these approaches, we find that the effects of quark off-shellness and intrinsic-k{sub T} parametrize those of higher twists. In particular, the off-shellness of partons generates part of the K-factor type corrections to the leading order cross section. Higher-twist contributions to the p{sub T}-spectrum of the Drell-Yan pairs are found to be large for presently accessible energies. The evolution of quark off-shellness distribution with the hard scale is also studied.

Authors:
; ;  [1]
  1. Institut fuer Theoretische Physik, Universitaet Giessen (Germany)
Publication Date:
OSTI Identifier:
20933230
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevD.75.014016; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CORRECTIONS; CROSS SECTIONS; DRELL MODEL; EVOLUTION; QUANTUM CHROMODYNAMICS; QUARKS

Citation Formats

Linnyk, O., Leupold, S., and Mosel, U. Next-to-leading order versus quark off-shellness and intrinsic k{sub T} in the Drell-Yan process. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.014016.
Linnyk, O., Leupold, S., & Mosel, U. Next-to-leading order versus quark off-shellness and intrinsic k{sub T} in the Drell-Yan process. United States. doi:10.1103/PHYSREVD.75.014016.
Linnyk, O., Leupold, S., and Mosel, U. Mon . "Next-to-leading order versus quark off-shellness and intrinsic k{sub T} in the Drell-Yan process". United States. doi:10.1103/PHYSREVD.75.014016.
@article{osti_20933230,
title = {Next-to-leading order versus quark off-shellness and intrinsic k{sub T} in the Drell-Yan process},
author = {Linnyk, O. and Leupold, S. and Mosel, U.},
abstractNote = {We calculate the effects of next-to-leading order perturbative QCD as well as of the quark transverse motion and off-shellness on the Drell-Yan process cross section. By studying the s{yields}{infinity} behavior of the cross section in these approaches, we find that the effects of quark off-shellness and intrinsic-k{sub T} parametrize those of higher twists. In particular, the off-shellness of partons generates part of the K-factor type corrections to the leading order cross section. Higher-twist contributions to the p{sub T}-spectrum of the Drell-Yan pairs are found to be large for presently accessible energies. The evolution of quark off-shellness distribution with the hard scale is also studied.},
doi = {10.1103/PHYSREVD.75.014016},
journal = {Physical Review. D, Particles Fields},
number = 1,
volume = 75,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}