Double Higgs production at NNLO interfaced to parton showers in GENEVA
Simone Alioli, Georgios Billis, Alessandro Broggio, Alessandro Gavardi, Stefan Kallweit, Matthew A. Lim, Giulia Marinelli, Riccardo Nagar, Davide Napoletano
Abstract
A bstract 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 G eneva framework and working in the heavy-top-limit approximation. This includes the resummation of large logarithms of the zero-jettiness $$ \mathcal{T} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>T</mml:mi> </mml:math> 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 G eneva , 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 P ythia 8 to include other parton showers, such as D ire and S herpa .