NLO parton shower for LHC physics - hard processes and beyond

TL;DR

This paper introduces a new method for incorporating NLO QCD corrections into initial state parton showers for LHC physics, demonstrating its effectiveness through heavy boson production simulations and discussing potential improvements.

Contribution

It presents an alternative methodology to existing NLO matching techniques like MC@NLO and POWHEG for Monte Carlo event generators.

Findings

Numerical results confirm the method's correctness.

The new approach is computationally efficient.

Potential refinements are discussed.

Abstract

The new methodology of adding QCD NLO corrections in the initial state Monte Carlo parton shower (hard process part) is presented using process of the heavy boson production at the LHC as an example. Despite the simplified model of the process, presented numerical results prove that the basic concept of the new methodology works correctly in the numerical environment of the Monte Carlo parton shower event generator. The presented method is an alternative to the well established methods, MC@NLO and POWHEG. Refinements of the new method with better computer CPU time efficiency are also discussed.