TY - JOUR A1 - Pisarski, Robert D. T1 - Chasing the Unicorn: RHIC and the QGP T2 - Brazilian journal of physics N2 - 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. KW - QCD KW - Quarks KW - Gluons KW - RHIC Y1 - 2012 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/26972 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-269725 SN - 0103-9733 SN - 1678-4448 N1 - SPECIAL ISSUE: XXV BRAZILIAN NATIONAL MEETING ON PARTICLES AND FIELDS N1 - All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License http://creativecommons.org/licenses/by-nc/3.0/ VL - 36 IS - 1b SP - 122 EP - 131 PB - Springer New York CY - New York, NY ER -