dorsal/arxiv
View SchemaInterplay of parton and hadron cascades in nucleus-nucleus collisions at the CERN SPS and RHIC
| Authors | Klaus Geiger, Ronald Longacre |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9705041 |
| URL | https://arxiv.org/abs/nucl-th/9705041 |
| Journal | Heavy Ion Phys.8:41-68,1998 |
Abstract
We introduce a Monte Carlo space-time model for high-energy collisions with nuclei, involving the dynamical interplay of perturbative QCD parton production and evolution, with non-perturbative parton-cluster formation and `afterburner' cascading of formed pre-hadronic clusters plus hadron excitations. This approach allows us to trace the space-time history of parton and hadron degrees of freedom of nuclear collisions on the microscopical level of parton and hadron cascades in both position and momentum space, from the instant of nuclear overlap to the final yield of particles. In applying this approach, we analyze Pb+Pb collisions at the CERN SPS with beam energy 158 GeV (sqrt{s}/A = 17 GeV) and Au+Au collisions at RHIC with collider energy \sqrt{s}/A = 200 GeV. We find that the perturbative QCD parton production and cascade development provides an important contribution to particle production at central rapidities, and that the `afterburner' cascading of pre-hadronic clusters and formed hadrons emerging from the parton cascade is essential. The overall agreement of our model calculations including the `afterburner' cascading with the observed particle spectra at the CERN SPS is fairly good, whereas the neglect of the final-state interactions among hadronic excitations deviates significantly.
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"abstract": "We introduce a Monte Carlo space-time model for high-energy collisions with\nnuclei, involving the dynamical interplay of perturbative QCD parton production\nand evolution, with non-perturbative parton-cluster formation and `afterburner\u0027\ncascading of formed pre-hadronic clusters plus hadron excitations. This\napproach allows us to trace the space-time history of parton and hadron degrees\nof freedom of nuclear collisions on the microscopical level of parton and\nhadron cascades in both position and momentum space, from the instant of\nnuclear overlap to the final yield of particles. In applying this approach, we\nanalyze Pb+Pb collisions at the CERN SPS with beam energy 158 GeV (sqrt{s}/A =\n17 GeV) and Au+Au collisions at RHIC with collider energy \\sqrt{s}/A = 200 GeV.\nWe find that the perturbative QCD parton production and cascade development\nprovides an important contribution to particle production at central\nrapidities, and that the `afterburner\u0027 cascading of pre-hadronic clusters and\nformed hadrons emerging from the parton cascade is essential. The overall\nagreement of our model calculations including the `afterburner\u0027 cascading with\nthe observed particle spectra at the CERN SPS is fairly good, whereas the\nneglect of the final-state interactions among hadronic excitations deviates\nsignificantly.",
"arxiv_id": "nucl-th/9705041",
"authors": [
"Klaus Geiger",
"Ronald Longacre"
],
"categories": [
"nucl-th",
"hep-ph",
"nucl-ex"
],
"journal_ref": "Heavy Ion Phys.8:41-68,1998",
"title": "Interplay of parton and hadron cascades in nucleus-nucleus collisions at the CERN SPS and RHIC",
"url": "https://arxiv.org/abs/nucl-th/9705041"
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