CERN Accelerating science

Article
Report number	arXiv:1908.06987 ; CERN-TH-2019-117 ; LAPTH-042/19 ; MPP-2019-177
Title	MiNNLO$_{\text{PS}}$: A new method to match NNLO QCD to parton showers
Author(s)	Monni, Pier Francesco (CERN) ; Nason, Paolo (INFN, Milan Bicocca ; Milan Bicocca U.) ; Re, Emanuele (CERN ; Annecy, LAPTH) ; Wiesemann, Marius (CERN ; Munich, Max Planck Inst.) ; Zanderighi, Giulia (Munich, Max Planck Inst.)
Publication	2020-05-27
Imprint	2019-08-19
Number of pages	45
Note	Fixed sign typo in Eq. (4.24)
In:	JHEP 2005 (2020) pp.143
DOI	10.1007/JHEP05(2020)143 10.1007/JHEP05(2020)143 (publication)
Subject category	hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Abstract	We present a novel method to combine QCD calculations at next-to-next-to-leading order (NNLO) with parton shower (PS) simulations, that can be applied to the production of heavy systems in hadronic collisions, such as colour singlets or a $t\bar{t}$ pair. The NNLO corrections are included by connecting the MiNLO$^\prime$ method with transverse-momentum resummation, and they are calculated at generation time without any additional reweighting, making the algorithm considerably efficient. Moreover, the combination of different jet multiplicities does not require any unphysical merging scale, and the matching preserves the structure of the leading logarithmic corrections of the Monte Carlo simulation for parton showers ordered in transverse momentum. We present proof-of-concept applications to hadronic Higgs production and the Drell-Yan process at the LHC.
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0)

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