A Simple shower and matching algorithm

@article{Giele2007ASS,
  title={A Simple shower and matching algorithm},
  author={Walter T. Giele and David A. Kosower and Peter Skands},
  journal={Physical Review D},
  year={2007},
  volume={78},
  pages={014026}
}
We present a simple formalism for parton-shower Markov chains. As a first step towards more complete ''uncertainty bands,'' we incorporate a comprehensive exploration of the ambiguities inherent in such calculations. To reduce this uncertainty, we then introduce a matching formalism which allows a generated event sample to simultaneously reproduce any infrared-safe distribution calculated at leading or next-to-leading order in perturbation theory, up to subleading corrections. To enable a more… 

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