NNLOPS accurate associated HW production

TL;DR

This paper introduces a NNLO accurate simulation of associated HW production matched with a parton shower, enhancing precision in theoretical predictions for collider experiments.

Contribution

It develops a novel reweighting method based on the MiNLO procedure to achieve NNLO accuracy in HW production simulations.

Findings

Achieves NNLO accuracy for HW production with parton shower matching.

Provides phenomenological results at 13 TeV with standard cuts.

Demonstrates improved theoretical precision over previous methods.

Abstract

We present a next-to-next-to-leading order accurate description of associated HW production consistently matched to a parton shower. The method is based on reweighting events obtained with the HW plus one jet NLO accurate calculation implemented in POWHEG, extended with the MiNLO procedure, to reproduce NNLO accurate Born distributions. Since the Born kinematics is more complex than the cases treated before, we use a parametrization of the Collins-Soper angles to reduce the number of variables required for the reweighting. We present phenomenological results at 13 TeV, with cuts suggested by the Higgs Cross Section Working Group.