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arXiv · 1909.02026

Higgsstrahlung at NNLL$'+$NNLO Matched to Parton Showers in GENEVA

Simone Alioli·Alessandro Broggio·Stefan Kallweit·Matthew A. Lim·Luca Rottoli
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Abstract

We present results for the Higgsstrahlung process within the GENEVA Monte Carlo framework. We combine the fully differential NNLO calculation with the higher-order resummation in the 0-jettiness resolution variable (beam-thrust). The resulting parton-level events are further showered and hadronised by Pythia8. The beam-thrust resummation is carried out to NNLL$'$ accuracy, which consistently incorporates all singular virtual and real NNLO corrections. It thus provides a natural perturbative connection between the NNLO calculation and the parton shower regime, including a systematic assessment of perturbative uncertainties. In this way, observables which are inclusive over the additional radiation are correct to NNLO, while the description of 0-jet-like resummation variables is improved beyond the parton shower approximation. We provide predictions for the 13 TeV LHC.

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Simone Alioli, Alessandro Broggio, Stefan Kallweit, Matthew A. Lim, Luca Rottoli. 2019-09-04. Higgsstrahlung at NNLL$'+$NNLO Matched to Parton Showers in GENEVA. https://doi.org/10.1103/physrevd.100.096016

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