https://doi.org/10.1140/epjp/i2012-12026-x
Regular Article
The Sudakov veto algorithm reloaded
1
DESY, Notkestrasse 85, D-22607, Hamburg, Germany
2
Institut für Theoretische Physik, KIT, D-76128, Karlsruhe, Germany
* e-mail: simon.plaetzer@desy.de
Received:
13
September
2011
Revised:
13
January
2012
Accepted:
15
February
2012
Published online:
1
March
2012
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.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2012
