Event Shapes and Power Corrections in e+e- Annihilation

2000/06/15 by O. Biebel, Biebel, O.
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0006020

4 pages, LaTeX, 4 .eps-files included, sprocl.sty and wrapfig.sty included, contribution to the Proceedings of the DIS 2000 conference, April 25-30, Liverpool, U.K

arxiv created 2000/06/15 · openalex publication_date 2000/06/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The effects of the hadronisation of partons on the distribution of event shape observables are associated with corrections which are suppressed by reciprocal powers of the energy scale of the process. The correction is determined by one non-calculable parameter α₀ for which an universal value of 0.5 +/- 20% is found from the investigation of the distribution of event shape observables and their mean values measured in e⁺e^- annihilation.

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• Determination of alpha_s(M_Z²) from hadronic event shape observables in e+e- annihilation