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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Bewick, G., Ravasio, S.F., Richardson, P. et al. Logarithmic accuracy of angular-ordered parton showers. J. High Energ. Phys. 2020, 19 (2020). https://doi.org/10.1007/JHEP04(2020)019
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DOI: https://doi.org/10.1007/JHEP04(2020)019