Probing the trilinear Higgs boson coupling in di-Higgs production at NLO QCD including parton shower effects

Abstract

We present results for Higgs boson pair production with variations of the trilinear Higgs boson self-coupling at next-to-leading order (NLO) in QCD including the full top quark mass dependence. Differential results at 14 TeV are presented, and we discuss the implications of anomalous trilinear couplings as well as differences between the PYTHIA 8.2 and HERWIG 7.1 parton showers in combination with POWHEG. The implementation of the NLO QCD calculation with variable Higgs boson self-coupling is made publicly available in the POWHEG-BOX-V2 Monte Carlo framework. A simple method for using the new implementation to study also variations of the top quark Yukawa coupling is described.

20 pages, 7 figures; v2: matches published version

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• Virtual corrections to Higgs boson pair production in the large top quark mass limit
• Probing the Higgs self coupling via single Higgs production at the LHC
• Indirect probes of the trilinear Higgs coupling: $gg\to h$ and $h\to \gamma \gamma$
• Differential Higgs Boson Pair Production at Next-to-Next-to-Leading Order in QCD
• Transverse-momentum resummation for Higgs boson pair production at the LHC with top-quark mass effects
• Real-virtual corrections to Higgs boson pair production at NNLO: three closed top quark loops
• Two-loop amplitudes for Higgs plus jet production involving a modified trilinear Higgs coupling

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