The Sudakov Veto Algorithm Reloaded

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.

Note:

5 pages, minor changes, corresponds to published version

12.38.Cy
02.70.Tt
color: correlation
parton: showers
splitting
Sudakov
Monte Carlo
infrared
quantum chromodynamics: perturbation theory
programming

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