AuthorsHolguin, Jack; orcid: 0000-0001-5183-2673; email: email@example.com
Forshaw, Jeffrey R.
MetadataShow full item record
AbstractAbstract: The dipole formalism provides a powerful framework from which parton showers can be constructed. In a recent paper (Forshaw et al. 2020), we proposed a dipole shower with improved colour accuracy and in this paper we show how it can be further improved. After an explicit check at O(αs2) we confirm that our original shower performs as it was designed to, i.e. inheriting its handling of angular-ordered radiation from a coherent branching algorithm. We also show how other dipole shower algorithms fail to achieve this. Nevertheless, there is an O(αs2) topology where it differs at sub-leading Nc from a coherent branching algorithm. This erroneous topology can contribute a leading logarithm to some observables and corresponds to emissions that are ordered in kt but not angle. We propose a simple, computationally efficient way to correct this and assign colour factors in accordance with the coherence properties of QCD to all orders in αs.
CitationThe European Physical Journal C, volume 81, issue 4, page 364
PublisherSpringer Berlin Heidelberg
DescriptionFrom Springer Nature via Jisc Publications Router
History: received 2021-02-24, pub-print 2021-04, accepted 2021-04-14, registration 2021-04-15, pub-electronic 2021-04-27, online 2021-04-27
Publication status: Published
Funder: Science and Technology Facilities Council; doi: http://dx.doi.org/10.13039/501100000271; Grant(s): ST/P000800/1
Funder: European Cooperation in Science and Technology; doi: http://dx.doi.org/10.13039/501100000921; Grant(s): CA16201 “PARTICLEFACE” and CA16108 “VB-SCAN
Funder: H2020 Marie Sklodowska-Curie Actions; doi: http://dx.doi.org/10.13039/100010665; Grant(s): 722104