Primordial hadrosynthesis in the Little Bang

Authors
Citation
U. Heinz, Primordial hadrosynthesis in the Little Bang, NUCL PHYS A, 661, 1999, pp. 140C-149C
Citations number
39
Categorie Soggetti
Physics
Journal title
NUCLEAR PHYSICS A
ISSN journal
03759474 → ACNP
Volume
661
Year of publication
1999
Pages
140C - 149C
Database
ISI
SICI code
0375-9474(199912)661:<140C:PHITLB>2.0.ZU;2-Y
Abstract
The present status of soft hadron production in high energy heavy-ion colli sions is summarized. In spite of strong evidence for extensive dynamical ev olution and collective expansion of the fireball before freeze-out I argue that its chemical composition is hardly changed by hadronic final state int eractions. The measured hadron yields thus reflect the primordial condition s at hadronization. The observed production pattern is consistent with stat istical hadronization at the Hagedorn temperature from a state of uncorrela ted, color deconfined quarks and antiquarks, but requires non-trivial chemi cal evolution of the fireball in a prehadronic (presumably QGP) stage befor e hadron formation.