183 research outputs found
Chasing the Unicorn: RHIC and the QGP
At nonzero temperature, it is expected that QCD undergoes a phase transition to a deconfined, chirally symmetric phase, the Quark-Gluon Plasma (QGP). I review what we expect theoretically about this possible transition, and what we have learned from heavy ion experiments at RHIC. I argue that while there are unambiguous signals for qualitatively new behavior at RHIC, versus experiments at lower energies, that in detail, no simple theoretical model can explain all salient features of the data
Applications of chiral symmetry
I discuss several topics in the applications of chiral symmetry at nonzero
temperature, including: where the rho goes, disoriented chiral condensates, and
the phase diagram for with flavors. (Based upon talks presented at
the "Workshop on Finite Temperature ", Wuhan, P.R.C., April, 1994.)Comment: 47 pages, LaTeX. 13 .epsi figures in a seperate uuencoded,
compressed, tarred file
Why the Quark-Gluon Plasma isn't a Plasma
An alternate picture of the deconfined phase of gauge theories is described.
Instead of a plasma, the theory is viewed as a condensate of Polyakov lines.
The pressure is determined by an elementary mean field theory.Comment: Presented at SEWM, 2000. Requires sprocl.st
Fuzzy Bags and Wilson Lines
I start with an elementary observation about the pressure in the deconfined
phase of a SU(3) gauge theory without quarks. This suggests a ``fuzzy'' bag
model for the analogous pressure in QCD, with dynamical quarks. I then sketch
how the deconfined phase might be described using an effective theory of Wilson
lines. To leading order in weak coupling, the effective electric field appears
in a form familiar from the lattice theory of Banks and Ukawa.Comment: 9 pages, 2 figures, PTPTeX. Based upon a talk given at Yukawa
International Seminar (YKIS) 2006, ``New Frontiers in QCD -- Exotic Hadrons
and Hadronic Matter'
To VMD, or not to VMD, in the quark-gluon plasma
I review results on the shift of the meson mass at nonzero temperature
in a gauged linear sigma model, under the assumption of strict vector meson
dominance. (Based upon a talk presented at the International Workshop on
"Chiral Dynamics in Hadrons and Nuclei", Seoul, Korea, Feb., 1995).Comment: 14 pages, LaTe
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