A Parton Shower for High Energy Jets

Preprint number: CP3-Origins-2011-14
Authors: Jeppe R. Andersen (CP3-Origins), Leif Lönnblad (CERN Theory Department & Lund University), and Jennifer M. Smillie (University of Edinburgh)
External link: arXiv.org

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We present a method to match the multi-parton states generated by the High Energy Jets Monte Carlo with parton showers generated by the Ariadne program using the colour dipole model. The High Energy Jets program already includes a full resummation of soft divergences. Hence, in the matching it is important that the corresponding divergences in the parton shower are subtracted, keeping only the collinear parts. We present a novel, shower-independent method for achieving this, enabling us to generate fully exclusive and hadronized events with multiple hard jets, in hadronic collisions. We discuss in detail the arising description of the soft, collinear and hard regions by examples in pure QCD jet-production.