Logarithmically-accurate and positive-definite NLO shower matching
A bstract We present methods to achieve NLL+NLO accurate parton showering for processes with two coloured legs: neutral- and charged-current Drell-Yan, and Higgs production in pp collisions, as well as DIS and e + e − to jets. The methods include adaptations of existing approaches, as well as a new NLO matching scheme, ESME, that is positive-definite by construction. Our implementations of the methods within the PanScales framework yield highly competitive NLO event generation speeds. We validate the fixed-order and combined resummation accuracy with tests in the limit of small QCD coupling and briefly touch on phenomenological comparisons to standard NLO results and to Drell-Yan data. The progress reported here is an essential step towards showers with logarithmic accuracy beyond NLL for processes with incoming hadrons.
Authors
- L. M. Scyboz (ORCID: https://orcid.org/0000-0001-8453-7937)
- Gavin P. Salam (ORCID: https://orcid.org/0000-0002-2655-4373)
- Melissa van Beekveld (ORCID: https://orcid.org/0000-0003-3607-4143)
- Silvia Ferrario Ravasio (ORCID: https://orcid.org/0000-0003-0280-3758)
- Jack Helliwell (ORCID: https://orcid.org/0000-0002-8725-7794)
- Grégory Soyez (ORCID: https://orcid.org/0000-0002-9490-9025)
- Alexander Karlberg (ORCID: https://orcid.org/0000-0003-0422-5891)
- Silvia Zanoli (ORCID: https://orcid.org/0000-0001-8948-2090)
- Alba Soto-Ontoso (ORCID: https://orcid.org/0000-0001-7408-4575)
Institutions
- Centre National de la Recherche Scientifique (FR)
- Universidad de Granada (ES)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Université Paris-Saclay (FR)
- Australian Regenerative Medicine Institute (AU)
- University of Oxford (GB)
- National Institute for Subatomic Physics (NL)
- CEA Paris-Saclay (FR)
- Monash University (AU)
- European Organization for Nuclear Research (CH)
Publication Details
- Journal
- Journal of High Energy Physics
- Published
- 2025-10-03
- DOI
- https://doi.org/10.1007/jhep10(2025)038
- Citations
- 4
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 7.48
Funders
- National Science Foundation
- National Niemann-Pick Disease Foundation
- European Commission
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- Science and Technology Facilities Council
- Kavli Institute for Theoretical Physics, University of California, Santa Barbara