Non-local slicing approaches for NNLO QCD in MCFM

Journal of High Energy Physics

John M. Campbell¹  R. Keith Ellis²  Satyajit Seth³ 

[1] Fermilab;Institute for Particle Physics Phenomenology, Durham University;Physical Research Laboratory;

关键词: Electroweak Precision Physics;    Higher-Order Perturbative Calculations;   

DOI  :  10.1007/JHEP06(2022)002

来源: DOAJ

【 摘 要 】

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, T $$ \mathcal{T} $$ 0, or on q T , the transverse momentum of the colour singlet final-state particles. We find that for most, but not all processes the q T slicing method leads to smaller power corrections for equal computational burden.

【 授权许可】

Unknown