NLO predictions for Higgs boson pair production with full top quark mass dependence matched to parton showers

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We present the first combination of NLO QCD matrix elements for di-Higgs production, retaining the full top quark mass dependence, with a parton shower.

• Results are provided within both the POWHEG-BOX and MadGraph5_aMC@NLO Monte Carlo frameworks.
• We assess in detail the theoretical uncertainties and provide differential results.
• We find that, as expected, the shower effects are relatively large for observables like the transverse momentum of the Higgs boson pair, which are sensitive to extra radiation.