SMEFT truncation effects in Higgs boson pair production at NLO QCD

TL;DR

This paper analyzes how different truncation methods of the SMEFT series affect predictions for Higgs boson pair production at NLO QCD, highlighting the importance of operator treatment in effective field theory calculations.

Contribution

It provides a detailed comparison of SMEFT truncation schemes in Higgs pair production at NLO QCD, addressing the impact of operator insertions on theoretical predictions.

Findings

Different truncation schemes lead to varying predictions for Higgs pair production.

Double operator insertions significantly influence the results.

The choice of SMEFT expansion method affects the interpretation of experimental data.

Abstract

We present results for Higgs boson pair production in gluon fusion at next-to-leading order in QCD, including effects of anomalous couplings within Standard Model Effective Field Theory (SMEFT). In particular, we investigate truncation effects of the SMEFT series, comparing different ways to treat powers of dimension-six operators and double operator insertions.