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Dilepton emission in ultrarelativistic nuclear collisions at the CERN SPS
We report on the measurement of electron-positron pairs in ultrarelativistic heavy-ion reactions at the CERN SPS. The enhancement of dilepton emission first seen by the CERES and HELIOS/3 collaborations for 200 A GeV sulphur projectiles on heavy targets is corroborated by the results for 158 A GeV P...
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Lenguaje: | eng |
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1999
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Acceso en línea: | http://cds.cern.ch/record/433212 |
_version_ | 1780895326186504192 |
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author | Fraenkel, Zeev |
author_facet | Fraenkel, Zeev |
author_sort | Fraenkel, Zeev |
collection | CERN |
description | We report on the measurement of electron-positron pairs in ultrarelativistic heavy-ion reactions at the CERN SPS. The enhancement of dilepton emission first seen by the CERES and HELIOS/3 collaborations for 200 A GeV sulphur projectiles on heavy targets is corroborated by the results for 158 A GeV Pb projectiles on a Au target. The enhancement increases faster than linearly with charged- particle multiplicity and is strongest at low pair p/sub perpendicular to /. Explanations based on pi /sup +/ pi /sup -/ annihilation in the hot and dense hadronic medium are discussed. The upgrade of the CERES spectrometer and plans for running at a lower beam energy are briefly described. (13 refs). |
id | cern-433212 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 1999 |
record_format | invenio |
spelling | cern-4332122019-09-30T06:29:59Zhttp://cds.cern.ch/record/433212engFraenkel, ZeevDilepton emission in ultrarelativistic nuclear collisions at the CERN SPSNuclear PhysicsWe report on the measurement of electron-positron pairs in ultrarelativistic heavy-ion reactions at the CERN SPS. The enhancement of dilepton emission first seen by the CERES and HELIOS/3 collaborations for 200 A GeV sulphur projectiles on heavy targets is corroborated by the results for 158 A GeV Pb projectiles on a Au target. The enhancement increases faster than linearly with charged- particle multiplicity and is strongest at low pair p/sub perpendicular to /. Explanations based on pi /sup +/ pi /sup -/ annihilation in the hot and dense hadronic medium are discussed. The upgrade of the CERES spectrometer and plans for running at a lower beam energy are briefly described. (13 refs).oai:cds.cern.ch:4332121999 |
spellingShingle | Nuclear Physics Fraenkel, Zeev Dilepton emission in ultrarelativistic nuclear collisions at the CERN SPS |
title | Dilepton emission in ultrarelativistic nuclear collisions at the CERN SPS |
title_full | Dilepton emission in ultrarelativistic nuclear collisions at the CERN SPS |
title_fullStr | Dilepton emission in ultrarelativistic nuclear collisions at the CERN SPS |
title_full_unstemmed | Dilepton emission in ultrarelativistic nuclear collisions at the CERN SPS |
title_short | Dilepton emission in ultrarelativistic nuclear collisions at the CERN SPS |
title_sort | dilepton emission in ultrarelativistic nuclear collisions at the cern sps |
topic | Nuclear Physics |
url | http://cds.cern.ch/record/433212 |
work_keys_str_mv | AT fraenkelzeev dileptonemissioninultrarelativisticnuclearcollisionsatthecernsps |