Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 12: Schwerionenkollisionen und QCD Phasen

HK 12.5: Talk

Monday, March 17, 2014, 17:45–18:00, HZ 6

Improving thermal models with sequential freeze out — •Pasi Huovinen — J.W. Goethe Universität, Frankfurt am Main, Germany

Thermal models have been surprisingly successful in describing the particle ratios observed in heavy ion collisions. However, the thermal models predict more protons and less cascades than measured by the ALICE collaboration at LHC. In this contribution I discuss how to improve the fit to data by assuming that not all particle number changing processes cease at the same time, but some of them maintain relative equilibrium even after the full equilibrium has been lost.