Asymptotic freedom and the running charge in high-temperature quantum chromodynamics
1989; Elsevier BV; Volume: 232; Issue: 3 Linguagem: Inglês
10.1016/0370-2693(89)90757-0
ISSN1873-2445
Autores Tópico(s)Quantum Mechanics and Applications
ResumoThe implications of asymptotic freedom for thermal gauge theories are elucidated in the context of recent attempts to calculate the non-abelian running charge at high temperatures. It is argued that the thermodynamical breakdown of manifest Lorentz invariance limits the usefulness of the concept of a running charge. Instead a well-defined fixed charge is shown to exist, vanishing asymptotically with the temperature, which is the natural choice for an expansion parameter.
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