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26 April 2024

» arxiv » hep-ph/0607305

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Next-to-leading order vs. quark off-shellness and intrinsic k_T in the Drell-Yan process
O. Linnyk ; S. Leupold ; U. Mosel ; PostScript ; PDF ; Other formats ; SLAC-SPIRES HEP ; to ; by ;
Date:	27 Jul 2006
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->infinity behaviour of the cross section in these approaches, we find that the effects of quark off-shellness and intrinsic-k_T parametrize those of higher twists. The transverse momentum of the Drell-Yan pairs and its evolution with the hard scale is also studied. Higher twist contributions to the dilepton p_T-spectrum are found to be large for presently accessible energies.
Source:	arXiv, hep-ph/0607305
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