Double Higgs production at NNLO interfaced to parton showers in GENEVA

In this work, we study the production of Higgs boson pairs at next-to-next-to leading order in QCD matched to parton showers, using the GENEVA framework and working in the heavy-top-limit approximation. This includes the resummation of large logarithms of the zero-jettiness T-0 up to the next-to-next-to-next-to-leading-log accuracy. This process features an extremely large momentum transfer, which makes its study particularly relevant for matching schemes such as that employed in GENEVA, where the resummation of a variable different from that used in the ordering of the parton shower is used. To further study this effect, we extend the original shower interface designed for PYTHIA8 to include other parton showers, such as DIRE and SHERPA.

Automated summary

In this study, the production of Higgs boson pairs at next-to-next-to leading order in QCD matched to parton showers is investigated using the GENEVA framework and heavy-top-limit approximation. The resummation of large logarithms of the zero-jettiness T-0 up to next-to-next-to-next-to-leading-log accuracy is included. The study is important for matching schemes like that employed in GENEVA, where a different variable is used for resummation compared to the ordering of the parton shower. To further investigate this effect, the original shower interface designed for PYTHIA8 is extended to include other parton showers such as DIRE and SHERPA.