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Logarithmic accuracy of angular-ordered parton showers.

Bewick, Gavin and Ravasio, Silvia Ferrario and Richardson, Peter and Seymour, Michael H. (2020) 'Logarithmic accuracy of angular-ordered parton showers.', Journal of high energy physics., 2020 (4). 019.

Abstract

We study the logarithmic accuracy of angular-ordered parton showers by considering the singular limits of multiple emission matrix elements. This allows us to consider different choices for the evolution variable and propose a new choice which has both the correct logarithmic behaviour and improved performance away from the singular regions. In particular the description of e+e− event shapes in the non-logarithmic region is significantly improved.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1007/JHEP04(2020)019
Publisher statement:This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Date accepted:18 March 2020
Date deposited:23 April 2020
Date of first online publication:03 April 2020
Date first made open access:23 April 2020

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