Next-to-next-to-leading order event generation for $VH$ production with $H\to b\bar{b}$ decay
| Autor: | Silvia Zanoli, Mauro Chiesa, Emanuele Re, Marius Wiesemann, Giulia Zanderighi |
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| Přispěvatelé: | Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Nuclear and High Energy Physics
spin: correlation effect: off-shell High Energy Physics::Phenomenology higher-order: 2 FOS: Physical sciences Higgs particle High Energy Physics - Experiment parton: showers High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] High Energy Physics::Experiment hadron hadron: interaction |
| Zdroj: | Journal of High Energy Physics |
| Popis: | We consider the Higgsstrahlung process in hadronic collisions and present the computation of next-to-next-to-leading order predictions matched to parton showers for both production and $H\to b\bar{b}$ decay employing the MiNNLO$_{\rm PS}$ method. We present predictions for $ZH$ and $W^{\pm}H$ production including spin correlations and off-shell effects by calculating the full processes $pp \to \ell^+\ell^-H \to \ell^+\ell^-b\bar{b}$, $pp \to \nu_\ell\bar\nu_\ell H \to \nu_\ell\bar\nu_\ell b\bar{b}$ and $pp \to \ell^\pm \nu_\ell H \to \ell^\pm \nu_\ell b\bar{b}$ in the narrow-width approximation for the Higgs boson. For the $W^{\pm}H$ process, NNLO+PS accuracy in production and decay is achieved for the first time. Our calculations are validated against earlier simulations in the NNLOPS approach that includes NNLO corrections via multi-differential reweighting. The new MiNNLO$_{\rm PS}$ generators for these processes, which evaluate NNLO corrections on-the-fly in the event generation, will supersede those earlier calculations. Our predictions are in good agreement with recent measurements of the Higgsstrahlung cross sections. Comment: 37 pages, 8 figures, 4 tables |
| Databáze: | OpenAIRE |
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