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

### Submission summary

 As Contributors: Andrii Verbytskyi Arxiv Link: https://arxiv.org/abs/2109.13114v2 (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 Specialties: High-Energy Physics - Theory High-Energy Physics - Phenomenology Approaches: Experimental, Phenomenological

### Abstract

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

Submission 2109.13114v2 on 29 October 2021

## Reports on this Submission

### Report

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

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