The Sudakov Veto Algorithm Reloaded

Details The Sudakov Veto Algorithm Reloaded The Sudakov Veto Algorithm Reloaded

2011-08-31

arxiv.org/abs/1108.6180v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, minor changes, corresponds to published version

Scientific paper

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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