dorsal/arxiv
View SchemaIntermediate-mass dilepton production in heavy-ion collisions at 200A GeV
| Authors | G. Q. Li, C. Gale |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9805052 |
| URL | https://arxiv.org/abs/nucl-th/9805052 |
| DOI | 10.1103/PhysRevLett.81.1572 |
| Journal | Phys.Rev.Lett.81:1572-1575,1998 |
Abstract
Through the analysis of HELIOS-3 data obtained at the CERN SPS, we demonstrate the importance of secondary processes for dilepton production in heavy-ion collisions in the intermediate invariant mass region. We find that while the dilepton spectra between 1 to 2.5 GeV from proton-induced reactions can be attributed to the decay of primary vector mesons, charmed hadrons, and initial Drell-Yan processes; the strong enhancement seen in the heavy-ion data as compared to the background comes mainly from the secondary processes which are germane to heavy-ion collisions. Furthermore, we find $\pi a_1\to l{\bar l}$ to be the most important process in this mass region, as was found by thermal rate calculations. We emphasize the constraints on the elementary cross sections by the experimental data from $e^+e^-$ annihilation.
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"abstract": "Through the analysis of HELIOS-3 data obtained at the CERN SPS, we\ndemonstrate the importance of secondary processes for dilepton production in\nheavy-ion collisions in the intermediate invariant mass region. We find that\nwhile the dilepton spectra between 1 to 2.5 GeV from proton-induced reactions\ncan be attributed to the decay of primary vector mesons, charmed hadrons, and\ninitial Drell-Yan processes; the strong enhancement seen in the heavy-ion data\nas compared to the background comes mainly from the secondary processes which\nare germane to heavy-ion collisions. Furthermore, we find $\\pi a_1\\to l{\\bar\nl}$ to be the most important process in this mass region, as was found by\nthermal rate calculations. We emphasize the constraints on the elementary cross\nsections by the experimental data from $e^+e^-$ annihilation.",
"arxiv_id": "nucl-th/9805052",
"authors": [
"G. Q. Li",
"C. Gale"
],
"categories": [
"nucl-th",
"hep-ph",
"nucl-ex"
],
"doi": "10.1103/PhysRevLett.81.1572",
"journal_ref": "Phys.Rev.Lett.81:1572-1575,1998",
"title": "Intermediate-mass dilepton production in heavy-ion collisions at 200A GeV",
"url": "https://arxiv.org/abs/nucl-th/9805052"
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