# Determination of the strong coupling using power corrections in the three-jet region

- Institution: CERN
- Department: Theory Colloquia
- Speaker: Giulia Zanderighi
- Year: 2023
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3013211)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

In the determination of the strong coupling constant from event shape variables in e+e- collisions, there has been a long-standing discrepancy between determinations that rely on analytic models for the non-perturbative corrections, and those that model hadronization corrections with Monte Carlo generators. Analytic approaches calculate non-perturbative corrections in the 2-jet region and apply them also to the 3-jet region. We study the impact of the new calculation of non-perturbative corrections in the 3-jet region and address whether the these calculations lift the tension in the determination of alpha_s. Other findings and considerations will also be discussed. .

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## Lectures

1. [Determination of the strong coupling using power corrections in the three-jet region](https://invisiblenetwork.ai/learn/cern/3013211/7120df657536), 1 h 14 min (CERN's player)