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Practical jet flavour through NNLO

Caletti, Simone; Larkoski, Andrew J.; Marzani, Simone; Reichelt, Daniel

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Authors

Simone Caletti

Andrew J. Larkoski

Simone Marzani



Abstract

An infrared and collinear (IRC) safe definition of the partonic flavour of a jet is vital for precision predictions of quantum chromodynamics at colliders. Jet flavour definitions have been presented in the literature, but they are typically defined through modification of the jet algorithm to be sensitive to partonic flavour at every stage of the clustering. While this does ensure that the sum of flavours in a jet is IRC safe, a flavour-sensitive clustering procedure is difficult to apply to realistic data. We introduce a distinct and novel approach to jet flavour that can be applied to a collection of partons defined by any algorithm. Our definition of jet flavour is the sum of flavours of all partons that remain after Soft Drop grooming, reclustered with the algorithm. We prove that this prescription is IRC safe through next-to-next-to-leading order (NNLO), and so can interface with the most precise fixed-order calculations for jets available at present. We validate the IRC safety of this definition with numeric fixed-order codes and further show that jet flavour with Soft Drop reclustered with a generalised kT algorithm fails to be IRC safe at NNLO.

Citation

Caletti, S., Larkoski, A. J., Marzani, S., & Reichelt, D. (2022). Practical jet flavour through NNLO. The European Physical Journal C, 82(7), Article 632. https://doi.org/10.1140/epjc/s10052-022-10568-7

Journal Article Type Article
Acceptance Date Jun 29, 2022
Online Publication Date Jul 23, 2022
Publication Date 2022
Deposit Date Jul 28, 2022
Publicly Available Date Sep 7, 2022
Journal The European Physical Journal C
Print ISSN 1434-6044
Publisher SpringerOpen
Peer Reviewed Peer Reviewed
Volume 82
Issue 7
Article Number 632
DOI https://doi.org/10.1140/epjc/s10052-022-10568-7
Related Public URLs https://arxiv.org/abs/2205.01109

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Advance online version This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.




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