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Titolo:
Do chemically saturated antihyperon abundancies signal the quark gluon plasma?
Autore:
Greiner, C;
Indirizzi:
Univ Giessen, Inst Theoret Phys, D-35392 Giessen, Germany Univ Giessen Giessen Germany D-35392 oret Phys, D-35392 Giessen, Germany
Titolo Testata:
ACTA PHYSICA HUNGARICA NEW SERIES-HEAVY ION PHYSICS
fascicolo: 1-4, volume: 14, anno: 2001,
pagine: 149 - 160
SICI:
1219-7580(2001)14:1-4<149:DCSAAS>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY-ION COLLISIONS; NUCLEUS-NUCLEUS COLLISIONS; STRANGENESS PRODUCTION; SPS ENERGIES; HADRON;
Keywords:
relativsitic heavy ion collisions; quark gluon plasma; (multi-)strange particles;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Greiner, C Univ Giessen, Inst Theoret Phys, D-35392 Giessen, Germany Univ Giessen Giessen Germany D-35392 D-35392 Giessen, Germany
Citazione:
C. Greiner, "Do chemically saturated antihyperon abundancies signal the quark gluon plasma?", APH NS-HEAV, 14(1-4), 2001, pp. 149-160

Abstract

We first review the production and the possible chemical equilibration of strange particles at CERN-SPS energies within a microscopic hadronic transport calculation. It is shown in particular that the strange quarks are produced initially via string excitations in the primary, secondary and ternaryinteractions. We then further elaborate on a recent idea of antihyperon production by multi-mesonic reactions like n(1)pi + n(2)K --> (Y) over bar ) p corresponding to the inverse of the strong binary baryon-antibaryon annihilation process. It is argued that by these reactions the (rare) antihyperons are driven towards local chemical equilibrium with pions, nucleons andkaons on a timescale of 1-3 fm/c in the still moderately baryon-dense initial hadronic environment after the termination of the prehadronic string phase. Accordingly this mechanism can provide a convenient explanation for the antihyperon. yields at CERN-SPS energies without any need of a deconfinedquark gluon plasma phase.

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Documento generato il 01/04/20 alle ore 11:35:04