NLO Multijet Merging for Higgs Production Beyond the VBF Approximation

TL;DR

This paper advances the simulation of electroweak Higgs boson production at the LHC by implementing NLO multijet merging beyond the VBF approximation, utilizing Herwig 7 and specialized libraries for detailed calculations.

Contribution

It introduces a novel approach to simulate Higgs production with improved accuracy by combining NLO multijet merging with full and approximate calculations beyond the VBF approximation.

Findings

Enhanced simulation accuracy for Higgs production

Implementation of NLO multijet merging techniques

Comparison of full and approximate amplitude calculations

Abstract

We present results of the simulation of electroweak Higgs boson production at the Large Hadron Collider using both the NLO multijet merging and NLO matching frameworks provided by the general purpose event generator Herwig 7. For the simulation of the hard scattering processes, we use the HJets library for the full calculation and VBFNLO for the approximate calculation to compute the $2\to h+n$ amplitudes at tree-level with $n=2,3,4$ and at one-loop with $n=2,3$.