Interleaved resonance decays and electroweak radiation in the Vincia parton shower
Helen Brooks, Peter Skands, Rob Verheyen
SciPost Phys. 12, 101 (2022) · published 22 March 2022
- doi: 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 com- mon 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 incom- ing 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
Cited by 7
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 Helen Brooks,
- 2 Peter Skands,
- 3 Rob Verheyen