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Titolo:
Mapping out the QCD phase transition in multiparticle production
Autore:
Kabana, S; Minkowski, P;
Indirizzi:
Univ Bern, High Energy Phys Lab, CH-3012 Bern, Switzerland Univ Bern Bern Switzerland CH-3012 y Phys Lab, CH-3012 Bern, Switzerland Univ Bern, Inst Theoret Phys, CH-3012 Bern, Switzerland Univ Bern Bern Switzerland CH-3012 eoret Phys, CH-3012 Bern, Switzerland
Titolo Testata:
NEW JOURNAL OF PHYSICS
, volume: 3, anno: 2001,
pagine: 41 - 431
SICI:
1367-2630(20010418)3:<41:MOTQPT>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEUS-NUCLEUS COLLISIONS; STRANGE PARTICLE-PRODUCTION; HEAVY-ION COLLISIONS; QUARK-GLUON PLASMA; SULFUR-NUCLEUS; ANTIBARYON PRODUCTION; HADRON-PRODUCTION; OXYGEN-NUCLEUS; LIGHT-FLAVOR; K-+/;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
91
Recensione:
Indirizzi per estratti:
Indirizzo: Kabana, S Univ Bern, High Energy Phys Lab, CH-3012 Bern, Switzerland Univ Bern Bern Switzerland CH-3012 , CH-3012 Bern, Switzerland
Citazione:
S. Kabana e P. Minkowski, "Mapping out the QCD phase transition in multiparticle production", NEW J PHYS, 3, 2001, pp. 41-431

Abstract

We analyse multiparticle production in a thermal framework for seven central nucleus + nucleus collisions, e(+) + e(-) annihilation into hadrons on the Z resonance and four hadronic reactions (p + p and p + (p) over bar withpartial centrality selection), with centre of mass energies ranging from roots = 2. 6 GeV (per nucleon pair) to 1.8 TeV. Thermodynamic parameters at chemical freeze-out (temperature and baryon and strangeness fugacities) areobtained from appropriate fits, generally improving in quality for reactions subjected to centrality cuts. All systems with non-vanishing fugacities are extrapolated along trajectories of equal energy density, density and entropy density to zero fugacities. The so-obtained temperatures extrapolatedto zero fugacities as a function of initial energy density in universally show a strong rise followed by a saturating limit of T-lim = 155 +/- 6 +/- 20 MeV. We interpret this behaviour as mapping out the boundary between quark gluon plasma and hadronic phases. The ratio of strange antiquarks to light ones as a function of the initial energy density in shows the same behaviour as the temperature, saturating at a value of 0.365 +/- 0.033 +/- 0.07. No distinctive feature of 'strangeness enhancement' is seen for heavy ion collisions relative to hadronic and leptonic reactions, when compared at the same initial energy density.

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Documento generato il 01/04/20 alle ore 23:59:15