Parton showers with more exact color evolution

Nagy, Zoltán (DESY, Notkestrasse 85, 22607 Hamburg, Germany) ; Soper, Davison E. (Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403-5203, USA)

15 March 2019

Abstract: Parton shower event generators typically approximate evolution of QCD color so that only contributions that are leading in the limit of an infinite number of colors are retained. Our parton shower generator, Deductor, has used an “LC+” approximation that is better, but still quite limited. In this paper, we introduce a new scheme for color in which the approximations can be systematically improved. That is, one can choose the theoretical accuracy level, but the accuracy level that is practical is limited by the computer resources available.

Published in: Physical Review D 99 (2019)
Published by: APS
DOI: 10.1103/PhysRevD.99.054009
License: CC-BY-4.0

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