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Traversing the QCD Phase Transition: Quenching Out of Equilibrium vs. Slowing Out of Equilibrium vs. Bubbling Out of Equilibrium | | Krishna Rajagopal
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11 May 2000 | | Journal: | Nucl.Phys. A680 (2000) 211-220 | | Subject: | hep-ph nucl-th | | Affiliation: | MIT | | Abstract: | I review arguments for the existence of a critical point E in the QCD phase diagram as a function of temperature T and baryon chemical potential mu. I describe how heavy ion collision experiments at the SPS and RHIC can discover the tell-tale signatures of such a critical point, thus mapping this region of the QCD phase diagram. I contrast the different ways in which the matter produced in a heavy ion collision can be driven out of equilibrium: quenching out of equilibrium (possible, but not guaranteed, if the transition region is traversed at mu << mu_E) vs. slowing out of equilibrium (guaranteed for mu sim mu_E) vs. bubbling out of equilibrium (possible, but not guaranteed, for mu >> mu_E). Quenching or bubbling create and amplify distinct, detectable, non-gaussian fluctuations. In contrast, slowing out of equilibrium reduces the magnitude of the specific, detectable, gaussian fluctuations which signal the presence of the critical point. | | Source: | arXiv, hep-ph/0005101 | | Services: | Forum | Review | PDF | Favorites | |
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