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The Sudakov veto algorithm reloaded

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Abstract

We perform a careful analysis of the main Monte Carlo algorithm used in parton shower simulations, the Sudakov veto algorithm. We prove a general version of the algorithm, directly including the dependence on the infrared cutoff. Taking this as a starting point, we then consider non-positive definite splitting kernels, as encountered when dealing with sub-leading colour correlations or splitting kernels beyond leading order. New algorithms suited for these situations are developed.

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Authors and Affiliations

  1. DESY, Notkestrasse 85, D-22607, Hamburg, Germany

    S. Plätzer

  2. Institut für Theoretische Physik, KIT, D-76128, Karlsruhe, Germany

    M. Sjödahl

Authors
  1. S. Plätzer
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  2. M. Sjödahl
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Correspondence to S. Plätzer.

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Plätzer, S., Sjödahl, M. The Sudakov veto algorithm reloaded. Eur. Phys. J. Plus 127, 26 (2012). https://doi.org/10.1140/epjp/i2012-12026-x

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  • DOI: https://doi.org/10.1140/epjp/i2012-12026-x

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