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Determination of $α_{S}$ beyond $NNLO$ using the event shape averages

by Adam Kardos, Gábor Somogyi, Andrii Verbytskyi

Submission summary

As Contributors: Andrii Verbytskyi
Arxiv Link: (pdf)
Date accepted: 2022-02-28
Date submitted: 2021-10-29 08:25
Submitted by: Verbytskyi, Andrii
Submitted to: SciPost Physics Proceedings
Proceedings issue: 50th International Symposium on Multiparticle Dynamics (ISMD2021)
Academic field: Physics
  • High-Energy Physics - Theory
  • High-Energy Physics - Phenomenology
Approaches: Experimental, Phenomenological


In this proceedings we discuss a prescription to extract the QCD strong coupling constant at $N^{3}LO$ precision in perturbative QCD using a combination of ${\cal{O}}(\alpha_{S}^{3})$ calculations in pQCD and estimations of the ${\cal{O}}(\alpha_{S}^{4})$ corrections from the data. The method is applied to a set of event shape averages measured in experiments at the LEP, PETRA, PEP and TRISTAN colliders. In our analysis we account for hadronization effects with models from modern Monte Carlo event generators and analytic hadronization models. We conclude that the precision of the $\alpha_{S}$ extraction cannot be improved significantly only with pQCD predictions of higher orders, and further progress in these studies requires a significant advances in the studies and modeling of hadronization process.

Current status:
Publication decision taken: accept

Editorial decision: For Journal SciPost Physics Proceedings: Publish
(status: Editorial decision fixed and (if required) accepted by authors)

Submission & Refereeing History

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Submission 2109.13114v2 on 29 October 2021

Reports on this Submission

Anonymous Report 1 on 2022-1-3 (Invited Report)


The paper is written well, no further corrections are needed.

  • validity: high
  • significance: high
  • originality: high
  • clarity: high
  • formatting: excellent
  • grammar: good

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