We present results for the Higgsstrahlung process within the geneva Monte Carlo framework. We combine the fully differential next-to-next-to-leading order (NNLO) calculation with the higher-order resummation in the 0-jettiness resolution variable (beam thrust). The resulting parton-level events are further showered and hadronized by pythia8. The beam thrust resummation is carried out to next-to-next-to-leading logarithmic accuracy, consistently incorporating 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.

Alioli, S., Broggio, A., Kallweit, S., Lim, M., Rottoli, L. (2019). Higgsstrahlung at NNLL′+NNLO matched to parton showers in GENEVA. PHYSICAL REVIEW D, 100(9) [10.1103/PhysRevD.100.096016].

Higgsstrahlung at NNLL′+NNLO matched to parton showers in GENEVA

Alioli, Simone;Broggio, Alessandro;Kallweit, Stefan;Rottoli, Luca
2019

Abstract

We present results for the Higgsstrahlung process within the geneva Monte Carlo framework. We combine the fully differential next-to-next-to-leading order (NNLO) calculation with the higher-order resummation in the 0-jettiness resolution variable (beam thrust). The resulting parton-level events are further showered and hadronized by pythia8. The beam thrust resummation is carried out to next-to-next-to-leading logarithmic accuracy, consistently incorporating 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.
Articolo in rivista - Articolo scientifico
QCD
English
2019
100
9
096016
open
Alioli, S., Broggio, A., Kallweit, S., Lim, M., Rottoli, L. (2019). Higgsstrahlung at NNLL′+NNLO matched to parton showers in GENEVA. PHYSICAL REVIEW D, 100(9) [10.1103/PhysRevD.100.096016].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/251700
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