Non-local slicing approaches for NNLO QCD in MCFM

Campbell, John M.; Ellis, R. Keith; Seth, Satyajit

Abstract

We present the implementation of several processes at Next-to-Next-to Leading Order (NNLO) accuracy in QCD in the parton-level Monte Carlo program MCFM. The processes treated are pp → H, W±, Z, W±H, ZH, W±γ, Zγ and γγ and, for the first time in the code, W+W−, W±Z and ZZ. Decays of the unstable bosons are fully included, resulting in a flexible fully differential Monte Carlo code. The NNLO corrections have been calculated using two non-local slicing approaches, isolating the doubly unresolved region by cutting on the zero-jettiness, T0, or on qT , the transverse momentum of the colour singlet final-state particles. We find that for most, but not all processes the qT slicing method leads to smaller power corrections for equal computational burden.

Citation

Campbell, J. M., Ellis, R. K., & Seth, S. (2022). Non-local slicing approaches for NNLO QCD in MCFM. Journal of High Energy Physics, 2022(6), Article 2. https://doi.org/10.1007/jhep06%282022%29002

• Journal Article Type: Article
• Acceptance Date: May 2, 2022
• Online Publication Date: Jun 1, 2022
• Publication Date: 2022-06
• Deposit Date: Jul 8, 2022
• Publicly Available Date: Jul 8, 2022
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2022
• Issue: 6
• Article Number: 2
• DOI: https://doi.org/10.1007/jhep06%282022%29002
• Public URL: https://durham-repository.worktribe.com/output/1201569