Diphoton rates from thermalized matter resulting in ultra-relativistic heavy-ion collisions
Diphoton radiation off strongly interacting matter resulting from ultrarelativistic heavy-ion collisions is estimated for SPS and RHIC conditions. At SPS emrgies tha thermal diphoton signal competes strongly with the Drell - Yan like background. For given charged-particle rapidity density a scenario...
| Main Authors: | , , , , |
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| Language: | English |
| Published: |
Forschungszentrum Rossendorf
2010
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| Online Access: | http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-31470 https://hzdr.qucosa.de/id/qucosa%3A21974 https://hzdr.qucosa.de/api/qucosa%3A21974/attachment/ATT-0/ |
| Summary: | Diphoton radiation off strongly interacting matter resulting from ultrarelativistic heavy-ion collisions is estimated for SPS and RHIC conditions. At SPS emrgies tha thermal diphoton signal competes strongly with the Drell - Yan like background. For given charged-particle rapidity density a scenario with deconfinement transition predicts a larger diphoton yield than a scenario without phase transition. For RHIC energies we find that radiation from initially undersaturated (but gluon-rich) deconfined matter overwhelms the hadron gas and the Drell - Yan like diphotons in the invariant mass window 1 < M < 2.5 GeW. Due to this the so-called M1 scaling is approximately obtained and can serve as additional tsol for discriminating radiation from quark-gluon matter. |
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