Konferenzpaper

Jahr der Veröffentlichung: 2001

Seiten: 149-160

Zeitschrift: Acta Physica Hungarica A: Heavy Ion Physics

Bandnummer: 14

Heftnummer: 1-4

ISSN: 1219-7580

DOI Link: https://doi.org/10.1556/APH.14.2001.1-4.15

Konferenz: Symposium on Fundamental Issues in Elementary Matter

Verlag: Springer Verlag

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 ternary interactions. 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 and kaons 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 deconfined quark gluon plasma phase.

Harvard-Zitierstil: Greiner, C. (2001) Do chemically saturated antihyperon abundancies signal the quark gluon plasma?, Acta Physica Hungarica A: Heavy Ion Physics, 14(1-4), pp. 149-160. https://doi.org/10.1556/APH.14.2001.1-4.15

APA-Zitierstil: Greiner, C. (2001). Do chemically saturated antihyperon abundancies signal the quark gluon plasma?. Acta Physica Hungarica A: Heavy Ion Physics. 14(1-4), 149-160. https://doi.org/10.1556/APH.14.2001.1-4.15