Inspecting the power of parton showering the generated events by comparing the events generated in NLO+PS to NLO and NNLO without parton shower in $e^+e^-$ at 91.2 GEV

TL;DR

This paper investigates the impact of parton showering on event generation in high-energy physics by comparing NLO+PS results with fixed-order calculations and real data in electron-positron collisions at 91.2 GeV.

Contribution

It provides a comparative analysis highlighting the role of parton showering in event simulation accuracy and physics insights.

Findings

Parton showering significantly affects event characteristics.

NLO+PS results show better agreement with experimental data.

Comparison reveals differences between fixed-order and showered events.

Abstract

In this study we tried to emphasize the role parton shower plays in event generation, and in the physics of high energy event generation. We achieved this task by comparing the next-to-leading order and next-to-next-to-leading order results from EERAD3 with the next-to-leading order plus parton shower results from Vincia, and comparing both with real data.