CERN Heavy Ion Forum

Reconsideration of Statistical Hadronization in Light of LHC Results

by Johann Rafelski (University of Arizona)

Thursday, 20 March 2014 from to (Europe/Zurich)
at CERN ( 4-3-006 - TH Conference Room )
Description I will address   hadronization process of a QGP fireball formed in relativistic heavy-ion collisions in the entire range of past and present reaction energies. I will show that QGP breakup occurs for all energies at the universal hadronization pressure $P = 80\pm 3\,\mathrm{MeV/fm}^3 $.  To achieve this result a precise method of analysis of hadron multiplicities has been developed contained in the ``SHARE with CHARM'' statistical hadronization  model.  All hadron produced over many orders of magnitude in yield are fully described in the full energy range -- exceptions are low SPS energies and very peripheral collisions. The properties of the  fireball final state can therefore be derived from what we see in all emitted hadronic particles. The key finding is that the dense matter created at  SPS, RHIC, *and* LHC shows  final state differentiated solely by: i) volume changes; and  ii) strangeness, (charm) flavor content.
By considering the total yields of the quark  flavor content of fireball and entropy we argue that the quark-gluon plasma phase is near to chemical equilibrium.  Such "Universal Hadronization" condition common to SPS, RHIC, *and* LHC has a simple interpretation:  direct QGP  evaporation into free-streaming hadrons.
Time permitting I will offer a brief  discussion of insights about heavy flavor production and its evolution to hadronization, and heavy flavor role in energy stopping in central rapidity region as function of reaction energy: the cases of LHC at full energy and FCC.
Slides
Organised by U. Wiedemann, Y. Foka
Videoconference Rooms
Reconsideration_of_Statistical_Hadronization_in_Light_of_LHC_
Name
Reconsideration_of_Statistical_Hadronization_in_Light_of_LHC_
Description
I will address hadronization process of a QGP fireball formed in relativistic heavy-ion collisions in the entire range of past and present reaction energies. I will show that QGP breakup occurs for all energies at the universal hadronization pressure $P = 80\pm 3\,\mathrm{MeV/fm}^3 $. To achieve this result a precise method of analysis of hadron multiplicities has been developed contained in the ``SHARE with CHARM'' statistical hadronization model. All hadron produced over many orders of magnitude in yield are fully described in the full energy range -- exceptions are low SPS energies and very peripheral collisions. The properties of the fireball final state can therefore be derived from what we see in all emitted hadronic particles. The key finding is that the dense matter created at SPS, RHIC, *and* LHC shows final state differentiated solely by: i) volume changes; and ii) strangeness, (charm) flavor content. By considering the total yields of the quark flavor content of fireball and entropy we argue that the quark-gluon plasma phase is near to chemical equilibrium. Such ";Universal Hadronization"; condition common to SPS, RHIC, *and* LHC has a simple interpretation: direct QGP evaporation into free-streaming hadrons. Time permitting I will offer a brief discussion of insights about heavy flavor production and its evolution to hadronization, and heavy flavor role in energy stopping in central rapidity region as function of reaction energy: the cases of LHC at full energy and FCC.
Extension
109308659
Owner
Urs Wiedemann
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