Speaker
Description
Studying the behavior of QCD at high temperatures is essential for understanding the properties of strongly interacting matter and its role in the evolution of the early Universe. A key quantity in this context is the QCD Equation of State. I present a non-perturbative determination with three massless quark flavors, covering a wide range of temperatures, from the electroweak scale down to 3 GeV, and smoothly connecting to the low-temperature regime. The comparison with perturbative predictions shows that, even at temperatures approaching the electroweak scale, the Equation of State can be reproduced only when adding higher-order terms in the strong coupling expansion, including non-perturbative contributions.
The strategy that allows the investigation of QCD in this previously unexplored high-temperature regime combines shifted boundary conditions with a definition of the lines of constant physics based on the running of a non-perturbatively defined renormalized coupling. This methodology is general and can be applied to QCD with four or five massive quark flavors.
| Parallel Session (for talks only) | Plenary talk |
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