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arxiv 1806.10102 v2 pith:OL52KNKZ submitted 2018-06-26 hep-ph

On stochastically sampling color configurations

classification hep-ph
keywords colorpartonshoweralgorithmsalgorithmconfigurationscorrectionssubleading
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Parton shower algorithms are key components of theoretical predictions for high-energy collider physics. Work towards more accurate parton shower algorithms is thus pursued along many different avenues. The systematic treatment of subleading color corrections in parton shower algorithms is however technically challenging and remains elusive. In this article, we present an efficient and numerically stable algorithm to sample color configurations at fixed $N_C=3$, using the correct color factor including subleading corrections with a parton shower. The algorithm is implemented as stand-alone program that can be interfaced to the PYTHIA event generator. Preliminary comparisons to to LEP data are presented.

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  1. A comprehensive guide to the physics and usage of PYTHIA 8.3

    hep-ph 2022-03 unverdicted novelty 2.0

    The paper provides a detailed physics and user manual for the PYTHIA 8.3 Monte Carlo event generator used in high-energy physics.