Parton showering with higher-logarithmic accuracy for soft emissions

Abstract

The accuracy of parton-shower simulations is often a limiting factor in the interpretation of data from high-energy colliders. We present the first formulation of parton showers with accuracy one order beyond state-of-the-art next-to-leading logarithms, for classes of observable that are dominantly sensitive to low-energy (soft) emissions, specifically non-global observables and subjet multiplicities. This represents a major step towards general next-to-next-to-leading logarithmic accuracy for parton showers.

arXiv comment6 pages, 4 figures + supplemental material (+ 5 pages, 3 figures); v2 matches the version published in Physical Review Letters

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• Next-to-leading-logarithmic PanScales showers for Deep Inelastic Scattering and Vector Boson Fusion
• Resummation of Next-to-Leading Non-Global Logarithms at the LHC
• HHH Whitepaper
• Introduction to the PanScales framework, version 0.1
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• Multi-Jet Production in Deep Inelastic Scattering with Pythia
• Monte Carlo Event Generators
• Structure of non-global logarithms with Cambridge/Aachen clustering
• Anomalous scaling of linear power corrections