MiNNLO$$_{\text {PS}}$$: optimizing $$2\rightarrow 1$$ hadronic processes
Pier Francesco Monni, Emanuele Ré, Marius Wiesemann
Abstract
Abstract We consider the MiNNLO $$_\mathrm{PS}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mrow/> <mml:mi>PS</mml:mi> </mml:msub> </mml:math> method to consistently combine next-to-next-to-leading order (NNLO) QCD calculations with parton-shower simulations. We identify the main sources of differences between MiNNLO $$_\mathrm{PS}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mrow/> <mml:mi>PS</mml:mi> </mml:msub> </mml:math> and fixed-order NNLO predictions for inclusive observables due to corrections beyond NNLO accuracy and present simple prescriptions to either reduce or remove them. Refined predictions are presented for Higgs, charged- and neutral-current Drell Yan production. The agreement with fixed-order NNLO calculations is considerably improved for inclusive observables and scale uncertainties are reduced. The codes are released within the POWHEG-BOX .