# Light Cone 2022 Online: Physics of Hadrons on the Light Front

Sep 19 – 23, 2022
ONLINE (ZOOM)
GMT timezone

## The QCD running coupling

Sep 22, 2022, 1:00 PM
30m
ONLINE (ZOOM)

### Speaker

Alexandre Deur (Jefferson Lab)

### Description

We will discuss the QCD running coupling $\alpha_s$, starting from its pQCD definition and then show how it can be extended to the non-perturbative domain using the concept of effective charges. This permits us to measure $\alpha_s$ in the non-perturbative domain, and compute it in the Holographic LF QCD (HLFQCD) approach. We will briefly describe the calculation, compare its result to $\alpha_s$ measurements, as well as to independent calculations based on the Dyson-Schwinger equations. Finally, we will show how αs from HLFQCD permits us to determine the hadron mass spectrum using solely $\Lambda_{QCD}$ as input.

### Primary author

Alexandre Deur (Jefferson Lab)

### Presentation materials

 Alexandre Deur.mp4 alphas_LC22.pdf