van Beekveld, Melissa;
Dasgupta, Mrinal;
El-Menoufi, Basem Kamal;
Ferrario Ravasio, Silvia;
Hamilton, Keith;
Helliwell, Jack;
Karlberg, Alexander;
... Soyez, Gregory; + view all
(2025)
New Standard for the Logarithmic Accuracy of Parton Showers.
Physical Review Letters
, 134
(1)
, Article 011901. 10.1103/physrevlett.134.011901.
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Abstract
We report on a major milestone in the construction of logarithmically accurate final-state parton showers, achieving next-to-next-to-leading-logarithmic (NNLL) accuracy for the wide class of observables known as event shapes. The key to this advance lies in the identification of the relation between critical NNLL analytic resummation ingredients and their parton-shower counterparts. Our analytic discussion is supplemented with numerical tests of the logarithmic accuracy of three shower variants for more than a dozen distinct event-shape observables in Z → qq¯ and Higgs → gg decays. The NNLL terms are phenomenologically sizeable, as illustrated in comparisons to data.
| Type: | Article |
|---|---|
| Title: | New Standard for the Logarithmic Accuracy of Parton Showers |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physrevlett.134.011901 |
| Publisher version: | https://doi.org/10.1103/physrevlett.134.011901 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3 . |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10203342 |
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