Perturbative Hot Gauge Theories - Recent Results
نویسنده
چکیده
Current results in high temperature gauge theories obtained in the context of the perturbative method of resumming hard thermal loops are reviewed. Beyond leading order properties of the gluon excitation, and the recent (controversial) calculations of the damping rates are discussed. QCD predictions on plasma signatures are exemplified by the thermal production rates of energetic as well as soft photons. [Talk given at the 3rd Workshop on Thermal Field Theories and their Applications, August 15–27, 1993, Banff, Alberta, Canada]
منابع مشابه
Static Mass Scales in Hot Gauge Theories
The static sectors of the electroweak Standard Model and QCD at finite temperatures are described by 3d SU(N) Higgs models with scalars in the fundamental and adjoint representation, respectively. I summarize the non-perturbative physics of these theories like mass spectrum, string tension, screening of the static potential and non-perturbative corrections to the Debye mass, as obtained from re...
متن کاملObstructions to dimensional reduction in hot QCD
I describe results on screening masses in hot gauge theories. Wilsonian effective long distance theories called dimensionally reduced (DR) theories describe very well the longest screening length in pure gauge theories. In the presence of fermions, meson-like screening lengths dominate the long-distance physics for 3Tc/2 ≤ T < 3Tc, and thus obstruct perturbative DR. Extrapolation of our results...
متن کاملHTL Resummation of the Thermodynamic Potential
Starting from the Φ-derivable approximation scheme at leading-loop order, the thermodynamical potential in a hot scalar theory, as well as in QED and QCD, is expressed in terms of hard thermal loop propagators. This nonperturbative approach is consistent with the leading-order perturbative results, ultraviolet finite, and, for gauge theories, explicitly gauge-invariant. For hot QCD it is argued...
متن کاملar X iv : h ep - t h / 01 11 05 8 v 1 7 N ov 2 00 1 1 Dynamics of hot gauge theories ∗
Much progress has been made on understanding static equilibrium properties of gauge theories at finite temperature. This includes perturbative results valid at asymptotically high temperature [1–4], as well as accurate results on phase structure, thermodynamics, correlation lengths and other observables from numerical simulations [5]. Far less progress has been made on dynamic properties of hot...
متن کاملEffective non - perturbative real - time dynamics of soft modes in hot gauge theories
We derive, from first principle, the Fokker-Planck equation describing the non-perturbative real-time evolution of a gauge field at high temperatures on the spatial scale (g 2 T) −1 and the time scale (g 4 T) −1 , where g is the gauge coupling and T is the temperature. The knowledge of the effective dynamics on such spatial and time scales is crucial for the understanding and quantitative calcu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008