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Low mass dilepton production at the SPS: probing hot and dense nuclear matter
CERES and HELIOS-3 have detected a significant enhancement of low--mass dileptons in nuclear collisions at 200 GeV/nucleon with respect to the expected ``conventional'' sources. The onset of the excess, starting at a mass of $\sim2m_{\pi}$, and the possibility of a quadratic dependence on...
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
1996
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/309225 |
| _version_ | 1780889968602775552 |
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| author | Pérez de los Heros, C Agakichiev, G Baur, R Breskin, Amos Chechik, R Drees, A Jacob, C Faschingbauer, U Fisher, P H Fraenkel, Zeev Fuchs, C Gatti, E Glässel, P Günzel, T F Hess, F Irmscher, D Lenkeit, B C Olsen, L H Panebratsev, Yu A Pfeiffer, A Ravinovich, I Rehak, P Schön, A Schükraft, Jürgen Sampietro, M Shimansky, S S Shor, A Specht, H J Steiner, V Tapprogge, Stefan Tel-Zur, G Tserruya, Itzhak Ullrich, T S Wurm, J P Yurevich, V I |
| author_facet | Pérez de los Heros, C Agakichiev, G Baur, R Breskin, Amos Chechik, R Drees, A Jacob, C Faschingbauer, U Fisher, P H Fraenkel, Zeev Fuchs, C Gatti, E Glässel, P Günzel, T F Hess, F Irmscher, D Lenkeit, B C Olsen, L H Panebratsev, Yu A Pfeiffer, A Ravinovich, I Rehak, P Schön, A Schükraft, Jürgen Sampietro, M Shimansky, S S Shor, A Specht, H J Steiner, V Tapprogge, Stefan Tel-Zur, G Tserruya, Itzhak Ullrich, T S Wurm, J P Yurevich, V I |
| author_sort | Pérez de los Heros, C |
| collection | CERN |
| description | CERES and HELIOS-3 have detected a significant enhancement of low--mass dileptons in nuclear collisions at 200 GeV/nucleon with respect to the expected ``conventional'' sources. The onset of the excess, starting at a mass of $\sim2m_{\pi}$, and the possibility of a quadratic dependence on the event multiplicity suggest the opening of the $\pi^+\pi^-\rightarrow e^+e^-(\mu^+\mu^-)$ annihilation channel. This would be the first observation of thermal radiation from dense hadronic matter. Possible interpretations of these results are presented, including the reduction of the $\rho$ mass due to partial restoration of chiral symmetry in the dense fireball formed in the collision. |
| id | cern-309225 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1996 |
| record_format | invenio |
| spelling | cern-3092252019-09-30T06:29:59Zhttp://cds.cern.ch/record/309225engPérez de los Heros, CAgakichiev, GBaur, RBreskin, AmosChechik, RDrees, AJacob, CFaschingbauer, UFisher, P HFraenkel, ZeevFuchs, CGatti, EGlässel, PGünzel, T FHess, FIrmscher, DLenkeit, B COlsen, L HPanebratsev, Yu APfeiffer, ARavinovich, IRehak, PSchön, ASchükraft, JürgenSampietro, MShimansky, S SShor, ASpecht, H JSteiner, VTapprogge, StefanTel-Zur, GTserruya, ItzhakUllrich, T SWurm, J PYurevich, V ILow mass dilepton production at the SPS: probing hot and dense nuclear matterParticle Physics - ExperimentCERES and HELIOS-3 have detected a significant enhancement of low--mass dileptons in nuclear collisions at 200 GeV/nucleon with respect to the expected ``conventional'' sources. The onset of the excess, starting at a mass of $\sim2m_{\pi}$, and the possibility of a quadratic dependence on the event multiplicity suggest the opening of the $\pi^+\pi^-\rightarrow e^+e^-(\mu^+\mu^-)$ annihilation channel. This would be the first observation of thermal radiation from dense hadronic matter. Possible interpretations of these results are presented, including the reduction of the $\rho$ mass due to partial restoration of chiral symmetry in the dense fireball formed in the collision.CERN-PPE-96-111oai:cds.cern.ch:3092251996 |
| spellingShingle | Particle Physics - Experiment Pérez de los Heros, C Agakichiev, G Baur, R Breskin, Amos Chechik, R Drees, A Jacob, C Faschingbauer, U Fisher, P H Fraenkel, Zeev Fuchs, C Gatti, E Glässel, P Günzel, T F Hess, F Irmscher, D Lenkeit, B C Olsen, L H Panebratsev, Yu A Pfeiffer, A Ravinovich, I Rehak, P Schön, A Schükraft, Jürgen Sampietro, M Shimansky, S S Shor, A Specht, H J Steiner, V Tapprogge, Stefan Tel-Zur, G Tserruya, Itzhak Ullrich, T S Wurm, J P Yurevich, V I Low mass dilepton production at the SPS: probing hot and dense nuclear matter |
| title | Low mass dilepton production at the SPS: probing hot and dense nuclear matter |
| title_full | Low mass dilepton production at the SPS: probing hot and dense nuclear matter |
| title_fullStr | Low mass dilepton production at the SPS: probing hot and dense nuclear matter |
| title_full_unstemmed | Low mass dilepton production at the SPS: probing hot and dense nuclear matter |
| title_short | Low mass dilepton production at the SPS: probing hot and dense nuclear matter |
| title_sort | low mass dilepton production at the sps: probing hot and dense nuclear matter |
| topic | Particle Physics - Experiment |
| url | http://cds.cern.ch/record/309225 |
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