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 1 order beyond state-of-the-art next-to-leading logarithms, for classes of observables that are dominantly sensitive to low-energy (soft) emissions, specifically nonglobal observables and subjet multiplicities. This represents a major step toward general next-to-next-to-leading logarithmic accuracy for parton showers.
Ferrario Ravasio, S., Hamilton, K., Karlberg, A., Salam, G., Scyboz, L., Soyez, G. (2023). Parton Showering with Higher Logarithmic Accuracy for Soft Emissions. PHYSICAL REVIEW LETTERS, 131(16) [10.1103/PhysRevLett.131.161906].
Parton Showering with Higher Logarithmic Accuracy for Soft Emissions
Ferrario Ravasio, S;
2023
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 1 order beyond state-of-the-art next-to-leading logarithms, for classes of observables that are dominantly sensitive to low-energy (soft) emissions, specifically nonglobal observables and subjet multiplicities. This represents a major step toward general next-to-next-to-leading logarithmic accuracy for parton showers.
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