Asia-Pacific Symposium for Lattice Field Theory (APLAT 2020)

Determination of αs in Nf=3 QCD from current-current correlation functions in position space

6 Aug 2020, 14:20

20m

online

Standard Model Parameters and Renormalisation Standard Model Parameters and Renormalisation

Speaker

Salvatore Calì (*) (Jagiellonian University)

Description

In this talk, we present a lattice determination of the coupling constant ${\alpha }_s$ in $N_f=3$ QCD for renormalization scales $\mu \in (1,2)$ GeV.
The computation has been performed on ensembles generated by the Coordinated Lattice Simulations (CLS) consortium, with tree-level Symanzik-improved gauge action and Wilson O(a)-improved fermions. Our approach is based on the study of current-current correlation functions in position space and allows to determine ${\alpha }_s$ (or alternatively the $\mathrm{\Lambda }$ parameter) with a competitive precision.

Presentation materials

cali_lat2020.pdf