Abstract
We have calculated the running coupling in SU(2), SU(3), and SU(4) gauge theories to see whether they have infrared fixed points. An infrared fixed point means no confinement: It means that the long-distance physics is conformal, without a mass scale and indeed without a particle spectrum. All these theories run slowly in perturbation theory, so a nonperturbative determination is interesting.
| Original language | English |
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| Journal | Proceedings of Science |
| State | Published - 2012 |
| Event | 10th Conference on Quark Confinement and the Hadron Spectrum, Confinement 2012 - Munich, Germany Duration: 8 Oct 2012 → 12 Oct 2012 |