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Parton showers with more exact color evolution

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arxiv 1902.02105 v2 pith:TVOH3TGY submitted 2019-02-06 hep-ph

classification hep-ph
keywords colorpartonaccuracyevolutionlevellimitedshowerapproximate
verification ladder T0 review T1 audit T2 compute T3 formal

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Parton shower event generators typically approximate evolution of QCD color so that only contributions that are leading in the limit of an infinite number of colors are retained. Our parton shower generator, Deductor, has used an "LC+" approximation that is better, but still quite limited. In this paper, we introduce a new scheme for color in which the approximations can be systematically improved. That is, one can choose the theoretical accuracy level, but the accuracy level that is practical is limited by the computer resources available.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Factorisation schemes for proton PDFs

    hep-ph 2025-01 conditional novelty 7.0 of 10

    All common NLO factorisation schemes for proton PDFs are special cases of a single discrete family, and scheme choice can shift LHC jet predictions by up to 20-30%.

  2. Recoil-Safe Subtraction, Matching and Merging in e+e- to hadrons

    hep-ph 2025-07 conditional novelty 6.0 of 10

    The Alaric shower is matched to NLO matrix elements and merged to five jets in e+e- to hadrons, with new analytic subtraction terms validated against Catani-Seymour subtraction.

  3. Super-Leading Logarithms in $pp\to2$ Jets

    hep-ph 2024-11 conditional novelty 6.0 of 10

    Super-leading logarithms contribute about 13 percent to the LHC pp to 2 jets gap-between-jets cross section at Q0 = 10 GeV, and a q qbar interference term is only 1/Nc suppressed.

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