About
The value of the strong coupling constant is key to understanding current high-energy experimental data. I will present a first-principles determination of αs using dedicated lattice-QCD techniques. The talk will focus on the methods that have enabled us to achieve sub-percent precision—our uncertainty is roughly half that of the combined phenomenological determinations—while keeping theoretical and other systematic errors sub-dominant. This result reduces theoretical uncertainties in high-energy experiments, enhancing prospects for new-physics discovery and enabling rigorous precision tests of the Standard Model, while confirming QCD as the theory of strong interactions across all energy scales.
0:00:00 Slide 1
0:03:12 Slide 2
0:04:34 Slide 3
0:05:39 Slide 4
0:06:40 Slide 5
0:06:50 Slide 6
0:08:39 Slide 7
0:09:12 Slide 8
0:09:34 Slide 9
0:10:12 Slide 10
0:12:15 Slide 11
The talk
Credits and licence
- Institution
- CERN
- Speaker
- Alberto Ramos Martinez
- Year
- 2026
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed