Higgs boson pair production at NLO in the POWHEG approach and the top quark mass uncertainties

TL;DR

This paper introduces a new Monte Carlo simulation tool for Higgs boson pair production at NLO that incorporates full top quark mass dependence, enabling detailed uncertainty analysis and flexible parameter variation.

Contribution

A novel Monte Carlo code based on analytic two-loop virtual corrections with full top quark mass dependence for Higgs pair production at NLO.

Findings

Quantifies uncertainties from top-mass renormalization schemes.

Allows variation of the Higgs self-coupling parameter.

Provides results for inclusive and differential observables.

Abstract

We present a new Monte Carlo code for Higgs boson pair production at next-to-leading order in the POWHEG-BOX Monte Carlo approach. The code is based on analytic results for the two loop virtual corrections which include the full top quark mass dependence. This feature allows to freely assign the value of all input parameters, including the trilinear Higgs boson self coupling, as well as to vary the renormalization scheme employed for the top quark mass. We study the uncertainties due to the top-mass renormalization scheme allowing the trilinear Higgs boson self coupling to vary around its Standard Model value including parton shower effects. Results are presented for both inclusive and differential observables.