Event Shapes from JADE Data and Studies of Power Corrections

TL;DR

This paper analyzes event shape observables from PETRA and LEP data, incorporating new QCD calculations and power correction models to refine measurements of the strong coupling constant across a range of energies.

Contribution

It introduces updated QCD calculations and power correction analyses for event shape observables, extending previous measurements of _s at various energies.

Findings

Refined _s values with improved theoretical models

Validation of power correction predictions across energies

Enhanced understanding of event shape distributions

Abstract

Studies of event shape observables at PETRA and LEP energies are presented. Previously published determinations of the strong coupling constant \alpha_s at \sqrt{s} = 35 and 44 GeV are complemented using new resummed QCD calculations for the C parameter and improved calculations for the jet broadening variables B_T and B_W which recently became available. Furthermore, recently predicted power corrections to the differential distributions of these observables are investigated. In this study, e^+e^- data between \sqrt{s} = 35 and 183 GeV are considered.