NNLO+PS double Higgs boson production with top-quark mass corrections in GENEVA

A bstract We present the implementation of the NNLO QCD corrections to double Higgs boson production at hadron colliders in G eneva , matched to the parton shower. We include top-quark mass effects and the resummation of large logarithms of the zero-jettiness $$ {\mathcal{T}}_0 $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>T</mml:mi> <mml:mn>0</mml:mn> </mml:msub> </mml:math> , up to NNLL ′ accuracy. This work extends our previous study, which was performed in the m t → ∞ infinite top-quark mass approximation, providing a more realistic simulation framework for Higgs boson pair production. We validate our approach against NNLO predictions by M atrix and assess the importance of mass effects comparing with our m t → ∞ previous implementation.