# The 35th International Symposium on Lattice Field Theory

18-24 June 2017
Palacio de Congresos
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# Contribution Parallel

Seminarios 1+2
Standard Model Parameters and Renormalization

# Computation of $\alpha_{qq}$ in QCD ($N_f=2$) using Lattice Perturbation Theory

## Speakers

• Mr. Salvatore CALI

## Content

We compute, up to order $g^4$ in perturbation theory, the fermionic contribution to the strong coupling $\alpha_{qq}$ extracted from the static force in Lattice QCD.

To this aim, we calculate perturbatively Wilson loops using a simplified version of QCD: a SU(3) gauge theory coupled to two degenerate quarks. In particular, we have considered the following discretization: Wilson's plaquette gauge action and a clover improved doublet of twisted mass Wilson fermions.

Our results will be compared to recent determinations of $\alpha_{qq}$ from simulations of two dynamical charm quarks [T. Korzec et al. (2016)].

## Preferred track (if multiple tracks have been selected)

Standard Model Parameters and Renormalization