dorsal/arxiv
View SchemaStrangeness Enhancement in $p+A$ and $S+A$ Interactions at SPS Energies
| Authors | V. Topor Pop, M. Gyulassy, X. N. Wang, A. Andrighetto, M. Morando, F. Pellegrini, R. A. Ricci, G. Segato |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9504003 |
| URL | https://arxiv.org/abs/nucl-th/9504003 |
| DOI | 10.1103/PhysRevC.52.1618 |
| Journal | Phys.Rev.C52:1618-1629,1995 |
Abstract
The systematics of strangeness enhancement is calculated using the HIJING and VENUS models and compared to recent data on $\,pp\,$, $\,pA\,$ and $\,AA\,$ collisions at CERN/SPS energies ($200A\,\, GeV\,$). The HIJING model is used to perform a {\em linear} extrapolation from $pp$ to $AA$. VENUS is used to estimate the effects of final state cascading and possible non-conventional production mechanisms. This comparison shows that the large enhancement of strangeness observed in $S+Au$ collisions, interpreted previously as possible evidence for quark-gluon plasma formation, has its origins in non-equilibrium dynamics of few nucleon systems. % Strangeness enhancement %is therefore traced back to the change in the production dynamics %from $pp$ to minimum bias $pS$ and central $SS$ collisions. A factor of two enhancement of $\Lambda^{0}$ at mid-rapidity is indicated by recent $pS$ data, where on the average {\em one} projectile nucleon interacts with only {\em two} target nucleons. There appears to be another factor of two enhancement in the light ion reaction $SS$ relative to $pS$, when on the average only two projectile nucleons interact with two target ones.
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"abstract": "The systematics of strangeness enhancement is calculated using the HIJING and\nVENUS models and compared to recent data on $\\,pp\\,$, $\\,pA\\,$ and $\\,AA\\,$\ncollisions at CERN/SPS energies ($200A\\,\\, GeV\\,$). The HIJING model is used to\nperform a {\\em linear} extrapolation from $pp$ to $AA$. VENUS is used to\nestimate the effects of final state cascading and possible non-conventional\nproduction mechanisms. This comparison shows that the large enhancement of\nstrangeness observed in $S+Au$ collisions, interpreted previously as possible\nevidence for quark-gluon plasma formation, has its origins in non-equilibrium\ndynamics of few nucleon systems. % Strangeness enhancement %is therefore traced\nback to the change in the production dynamics %from $pp$ to minimum bias $pS$\nand central $SS$ collisions. A factor of two enhancement of $\\Lambda^{0}$ at\nmid-rapidity is indicated by recent $pS$ data, where on the average {\\em one}\nprojectile nucleon interacts with only {\\em two} target nucleons. There appears\nto be another factor of two enhancement in the light ion reaction $SS$ relative\nto $pS$, when on the average only two projectile nucleons interact with two\ntarget ones.",
"arxiv_id": "nucl-th/9504003",
"authors": [
"V. Topor Pop",
"M. Gyulassy",
"X. N. Wang",
"A. Andrighetto",
"M. Morando",
"F. Pellegrini",
"R. A. Ricci",
"G. Segato"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.52.1618",
"journal_ref": "Phys.Rev.C52:1618-1629,1995",
"title": "Strangeness Enhancement in $p+A$ and $S+A$ Interactions at SPS Energies",
"url": "https://arxiv.org/abs/nucl-th/9504003"
},
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