A Positive-Weight Next-to-Leading-Order Monte Carlo Simulation of Deep Inelastic Scattering and Higgs Boson Production via Vector Boson Fusion in Herwig++

TL;DR

This paper presents a positive-weight NLO Monte Carlo simulation for Deep Inelastic Scattering and Higgs production via vector boson fusion in Herwig++, combining parton showers with NLO calculations for more accurate event modeling.

Contribution

It introduces a positive-weight NLO matching scheme applied to DIS and Higgs production in Herwig++, including a full implementation of the truncated shower for soft emissions.

Findings

Successful implementation of positive-weight NLO matching in Herwig++

Accurate modeling of soft emissions with truncated shower

Enhanced simulation fidelity for DIS and Higgs VBF processes

Abstract

The positive weight next-to-leading-order matching formalism (POWHEG) is applied to Deep Inelastic Scattering (DIS) and the related Higgs boson production via vector-boson fusion process in the Herwig++ Monte Carlo event generator. This scheme combines parton shower simulation and next-to-leading-order calculation in a consistent way which only produces positive weight events. The simulation contains a full implementation of the truncated shower required to correctly model soft emissions in an angular-ordered parton shower.