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arXiv · 1812.06692

Precision Determination of $\alpha_s$ from Lattice QCD

Mattia Dalla Brida
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Abstract

We present an overview of the recent lattice determination of the QCD coupling $\alpha_s$ by the ALPHA Collaboration. The computation is based on the non-perturbative determination of the $\Lambda$-parameter of $N_{\rm f}=3$ QCD, and the perturbative matching of the $N_{\rm f}=3$ and $N_{\rm f}=5$ theories. The final result: $\alpha_s(m_Z)=0.11852(84)$, reaches sub-percent accuracy.

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Mattia Dalla Brida. 2018-12-17. Precision Determination of $\alpha_s$ from Lattice QCD. https://doi.org/10.3390/universe4120148

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