Some applications of thermal field theory to quark-gluon plasma

Hard Thermal Loops , Quark - Gluon Plasma Response

I outline various derivations of the non-Abelian Kubo equation, which governs the response of a quark-gluon plasma to hard thermal perturbations. In the static case, it is proven that gauge theories do not support hard thermal solitons. Explicit solutions are constructed within an SU (2) Ansatz and they are shown to support the general result. The time-dependent problem, i.e., non-Abelian plasm...

Thermal rho’s in the quark-gluon plasma

I discuss different models which predict changes in the mass of the thermal ρ field. I emphasize that while the predictions are strongly model dependent, nevertheless substantial shifts in the thermal ρ mass are expected to occur at the point of phase transition. As long as the thermal ρ peak does not become too broad, this should provide a striking signature of the existence of a phase transit...

Theory of the Quark-Gluon Plasma

The Quark-Gluon Plasma: Collective Dynamics and Hard Thermal Loops

We present a unified description of the high temperature phase of QCD, the so-called quark-gluon plasma, in a regime where the effective gauge coupling g is sufficiently small to allow for weak coupling calculations. The main focuss is the construction of the effective theory for the collective excitations which develop at a typical scale gT , which is well separated from the typical energy of ...

Quark-Gluon Plasma Signatures

Aspects of quark-gluon plasma signatures that can be measured by CMS are discussed. First the initial conditions of the system from minijet production are introduced, including shadowing effects. Color screening of the Upsilon family is then presented, followed by energy loss effects on charm and bottom hadrons, high pT jets and global observables. ∗) This work was supported in part by the Dire...