Strong Coupling Constant Determination from Global QCD Analysis
Published:Dec 29, 2025 19:00
•1 min read
•ArXiv
Analysis
This paper provides an updated determination of the strong coupling constant αs using high-precision experimental data from the Large Hadron Collider and other sources. It also critically assesses the robustness of the αs extraction, considering systematic uncertainties and correlations with PDF parameters. The paper introduces a 'data-clustering safety' concept for uncertainty estimation.
Key Takeaways
- •Provides an up-to-date determination of the strong coupling constant αs.
- •Assesses the robustness of the αs extraction considering uncertainties and correlations.
- •Introduces the concept of 'data-clustering safety' for uncertainty estimation.
- •Finds αs(MZ) = 0.1183+0.0023−0.0020 at the 68% credibility level.
Reference
“αs(MZ)=0.1183+0.0023−0.0020 at the 68% credibility level.”