Logarithmic accuracy of angular-ordered parton showers

Autor: Gavin Bewick, Silvia Ferrario Ravasio, Peter Richardson, Michael H. Seymour
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Journal of High Energy Physics, Vol 2020, Iss 4, Pp 1-34 (2020)
Druh dokumentu: article
ISSN: 1029-8479
DOI: 10.1007/JHEP04(2020)019
Popis: 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.
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