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The usage of the K factor in heavy ion physics

The usage of the K factor in heavy ion physics The theoretical K factor, describing the difference between the leading and higher-order cross sections, can be defined in more than one way. The resulting estimate of the higher-order cross section is sensitive to the order of the fit to the parton densities and the number of loops at which αs is evaluated. We describe alternate ways to define the K factor and show how the definition affects its magnitude and shape for the examples of hadroproduction of Drell-Yan lepton pairs and heavy quarks. We discuss which definition is appropriate under what circumstances. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Physica Hungarica Series A, Heavy Ion Physics Springer Journals

The usage of the K factor in heavy ion physics

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References (37)

Publisher
Springer Journals
Copyright
Copyright © 2003 by Akadémiai Kiadó
Subject
Physics; Nuclear Physics, Heavy Ions, Hadrons
ISSN
1219-7580
eISSN
1588-2675
DOI
10.1556/APH.17.2003.1.9
Publisher site
See Article on Publisher Site

Abstract

The theoretical K factor, describing the difference between the leading and higher-order cross sections, can be defined in more than one way. The resulting estimate of the higher-order cross section is sensitive to the order of the fit to the parton densities and the number of loops at which αs is evaluated. We describe alternate ways to define the K factor and show how the definition affects its magnitude and shape for the examples of hadroproduction of Drell-Yan lepton pairs and heavy quarks. We discuss which definition is appropriate under what circumstances.

Journal

Acta Physica Hungarica Series A, Heavy Ion PhysicsSpringer Journals

Published: Aug 28, 2009

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