Color-singlet production at NNLO in MCFM

Boughezal, Radja; Campbell, John M.; Ellis, R. Keith; Focke, Christfried; Giele, Walter; Liu, Xiaohui; Petriello, Frank; Williams, Ciaran

Abstract

We present the implementation of several color-singlet final-state processes at Next-to-Next-to Leading Order (NNLO) accuracy in QCD to the publicly available parton-level Monte Carlo program MCFM. Specifically we discuss the processes pp→Hpp→H , pp→Zpp→Z , pp→Wpp→W , pp→HZpp→HZ , pp→HWpp→HW and pp→γγpp→γγ . Decays of the unstable bosons are fully included, resulting in a flexible fully differential Monte Carlo code. The NNLO corrections have been calculated using the non-local N-jettiness subtraction approach. Special attention is given to the numerical aspects of running MCFM for these processes at this order. We pay particular attention to the systematic uncertainties due to the power corrections induced by the N-jettiness regularization scheme and the evaluation time needed to run the hybrid openMP/MPI version of MCFM at NNLO on multi-processor systems.

Citation

Boughezal, R., Campbell, J. M., Ellis, R. K., Focke, C., Giele, W., Liu, X., …Williams, C. (2017). Color-singlet production at NNLO in MCFM. The European Physical Journal C, 77(1), Article 7. https://doi.org/10.1140/epjc/s10052-016-4558-y

• Journal Article Type: Article
• Acceptance Date: Dec 7, 2016
• Online Publication Date: Dec 30, 2016
• Publication Date: Jan 1, 2017
• Deposit Date: Jul 13, 2017
• Publicly Available Date: Jul 13, 2017
• Journal: European Physical Journal C: Particles and Fields
• Print ISSN: 1434-6044
• Electronic ISSN: 1434-6052
• Publisher: SpringerOpen
• Peer Reviewed: Peer Reviewed
• Volume: 77
• Issue: 1
• Article Number: 7
• DOI: https://doi.org/10.1140/epjc/s10052-016-4558-y
• Public URL: https://durham-repository.worktribe.com/output/1355245