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Interleaved Resonance Decays and Electroweak Radiation in Vincia

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arxiv 2108.10786 v2 pith:5A7MJFAR submitted 2021-08-24 hep-ph

Helen Brooks , Peter Skands , Rob Verheyen This is my paper
classification hep-ph
keywords branchingdecayselectroweakinterleavedprocessesresonancescalestreatment
verification ladder T0 review T1 audit T2 compute T3 formal
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We propose a framework for high-energy interactions in which resonance decays and electroweak branching processes are interleaved with the QCD evolution in a single common sequence of decreasing resolution scales. The interleaved treatment of resonance decays allows for a new treatment of finite-width effects in parton showers. At scales above their offshellness, resonances participate explicitly as incoming and outgoing states in branching processes, while they are effectively "integrated out" of the description at lower scales. We implement this formalism, together with a full set of antenna functions for branching processes involving electroweak (W/Z/H) bosons in the Vincia shower module in Pythia 8.3, and study some of the consequences.

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Cited by 4 Pith papers

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

  1. Resonance-aware parton-shower matching for off-shell top-antitop production with semi-leptonic decays at electron-positron colliders

    hep-ph 2026-02 conditional novelty 7.0 of 10

    A resonance-aware MC@NLO matching procedure preserves top-antitop line shapes when NLO QCD predictions for off-shell ttbar production at e+e− colliders are showered with Pythia8.

  2. Sudakov evolution without unitarity

    hep-ph 2025-06 accept novelty 7.0 of 10

    Sunshine removes Sudakov factors from parton-shower sampling by keeping every intermediate state, giving direct tree-level expansions and enabling tests of matrix-element corrections.

  3. Massive On-shell Splitting Functions in Spinor-Helicity Formalism

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Massive SM splitting functions are reconstructed from on-shell amplitudes via SW collinear spinors and a Higgs-insertion dictionary.

  4. How to identify the dead cone in the top-quark jet

    hep-ph 2025-12 conditional novelty 6.0 of 10

    A Monte-Carlo study shows the top-quark dead cone can be extracted from top jets by extrapolating momentum spectra to zero b-decay angle, matching MLLA expectations to ~15%.

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