Matching uncertainties in the prediction of the Higgs boson transverse momentum in the SM and beyond

TL;DR

This paper analyzes theoretical uncertainties in predicting the Higgs boson's transverse momentum in gluon fusion, comparing matching scale prescriptions across different frameworks for the Standard Model and beyond.

Contribution

It provides a detailed comparison of matching scale determination methods and applies them to various Higgs production scenarios in different theoretical frameworks.

Findings

Matching scale prescriptions significantly affect predictions.

Different frameworks show consistent uncertainty estimates.

Results inform more reliable Higgs transverse momentum predictions.

Abstract

We present the results of our recent study (arXiv:1510.08850) of the theoretical uncertainties that affect the predictions for the Higgs-boson transverse-momentum in gluon fusion when fixed- and all-order results are matched. Our investigation consists of a twofold analysis: first we present a detailed comparison of two recently introduced prescriptions for the determination of the matching scale (arXiv:1409.0531, arXiv:1505.00735), then we apply the results of these methods to three widely used matching frameworks, namely the aMC@NLO and POWHEG Monte Carlo approaches and analytic resummation. The results of our study are applied to the production of the SM Higgs boson and of the neutral Higgs bosons of the Two-Higgs-Doublet Model in a variety of scenarios.