Abstract
The couplings of the Higgs boson to other particles are increasingly well measured by the ATLAS and CMS experiments. The Higgs boson trilinear self-coupling however is still largely unconstrained, mainly due to the low cross-section for Higgs boson pair production. We present inclusive and differential results for the NLO QCD corrections to Higgs boson pair production with the full top-quark mass dependence, where the Higgs trilinear coupling is varied to non-SM values. The fixed-order calculation is supplemented by parton showering within the Powheg-BOX-V2 event generator, and both Pythia8 and Herwig7 parton-shower algorithms are implemented in a preliminary study of shower effects.
Highlights
Impressive experimental constraints have been set on the Higgs boson couplings to vector bosons and heavy fermions [1, 2, 3, 4]
We present inclusive and differential results for the NLO QCD corrections to Higgs boson pair production with the full top-quark mass dependence, where the Higgs trilinear coupling is varied to non-SM values
The Higgs boson trilinear self-coupling λ can be experimentally constrained by exclusion limits on Higgs boson pair production pp → hh [5, 6], where the best limit on κλ = λ/λSM is currently given by ATLAS with −5.0 < κλ < 12.0 at 95% confidence level
Summary
Impressive experimental constraints have been set on the Higgs boson couplings to vector bosons and heavy fermions [1, 2, 3, 4]. Published at: Heinrich, G; Jones, S; Kerner, M; Luisoni, G; Scyboz, L (2020). Trilinear Higgs boson coupling variations for di-Higgs production with full NLO QCD predictions in Powheg
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