Brooks, Helen;
Skands, Peter;
Verheyen, Rob;
(2022)
Interleaved resonance decays and electroweak radiation in the Vincia parton shower.
Scipost Physics
, 12
(3)
, Article 101. 10.21468/SciPostPhys.12.3.101.
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Abstract
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 (i.e., typically Q > γ ), 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.
| Type: | Article |
|---|---|
| Title: | Interleaved resonance decays and electroweak radiation in the Vincia parton shower |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.21468/SciPostPhys.12.3.101 |
| Publisher version: | https://doi.org/10.21468/SciPostPhys.12.3.101 |
| Language: | English |
| Additional information: | Copyright H. Brooks et al. This work is licensed under the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, TOP-QUARK MASS, LOOP LEADING LOGARITHMS, SPIN CORRELATIONS, COMBINATION, ALGORITHM, FACTORIZATION, T(T)OVER-BAR, TEV |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10147716 |
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