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CERN Heavy Ion Forum
Statistical hadronization phenomenology in heavy ion collisions
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Europe/Zurich
160/1-009 (CERN)
Description
After introducing statistical hadronization, we argue that a distinction can be made between equilibrated staged freeze-out in which post-formation hadron interactions play an important role in determining final-state observables, and non-equilibrium sudden freeze-out where spectra and abundances get determined at the same time and further interactions are negligible. We compare fits to particle yields done within equilibrium and non-equilibrium models, and show that dropping the equilibration requirement significantly raises the fit's statistical significance.We attempt to falsify sudden freeze-out by examining whether particle abundances and spectra can be described using the same formation temperature.
Our fits to particle spectra suggest that the same temperature can be used to describe both spectra and abundances both within the equilibrium and non-equilibrium ansatz. We finish by showing how short-lived resonances can be used to further distinguish between different freeze-out scenarios.
Organiser(s): Yiota Foka and Urs Achim Wiedemann
More information: http://home.cern.ch/a/alicedoc/www/chic/
Our fits to particle spectra suggest that the same temperature can be used to describe both spectra and abundances both within the equilibrium and non-equilibrium ansatz. We finish by showing how short-lived resonances can be used to further distinguish between different freeze-out scenarios.
Organiser(s): Yiota Foka and Urs Achim Wiedemann
More information: http://home.cern.ch/a/alicedoc/www/chic/