Low-mass lepton pair production in Pb - Au collisions at 40 A $\cdot$ GeV

The CERES/NA45 experiment at the CERN SPS has previously measured e **+e**- pair production in 160 A center dot GeV Pb-Au collisions. In the mass region m greater than 0.2 GeV/c**2, an enhancement of 2.7 plus or minus 0.4(stat.) plus or minus 0.5(syst.) compared to the expectation from known hadroni...

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Detalles Bibliográficos
Autores principales: Adamova, D, Agakichiev, G, Appelshäuser, H, Belaga, V, Braun-Munzinger, P, Cherlin, A, Damjanovic, S, Dietel, T, Dietrich, L, Drees, A, Esumi, S I, Filimonov, K, Fomenko, K, Fraenkel, Zeev, Garabatos, C, Glässel, P, Hering, G, Holeczek, J, Kushpil, V, Lenkeit, B C, Maas, A, Marin, A, Milosevic, J, Milov, A, Miskowiec, D, Panebratsev, Yu A, Petchenova, O Yu, Petrácek, V, Pfeiffer, A, Rak, J, Ravinovich, I, Rehak, P, Richter, M, Sako, H, Schmitz, W, Schükraft, Jürgen, Sedykh, S, Seipp, W, Shimansky, S S, Slívova, J, Specht, H J, Stachel, J, Sumbera, M, Tilsner, H, Tserruya, Itzhak, Wessels, J P, Wienold, T, Windelband, B, Wurm, J P, Xie, W, Yurevich, S, Yurevich, V
Lenguaje:eng
Publicado: 2003
Materias:
Nuclear Physics
Acceso en línea:https://dx.doi.org/10.1007/BF02707032
http://cds.cern.ch/record/643298
_version_ 1780900775009976320
author Adamova, D
Agakichiev, G
Appelshäuser, H
Belaga, V
Braun-Munzinger, P
Cherlin, A
Damjanovic, S
Dietel, T
Dietrich, L
Drees, A
Esumi, S I
Filimonov, K
Fomenko, K
Fraenkel, Zeev
Garabatos, C
Glässel, P
Hering, G
Holeczek, J
Kushpil, V
Lenkeit, B C
Maas, A
Marin, A
Milosevic, J
Milov, A
Miskowiec, D
Panebratsev, Yu A
Petchenova, O Yu
Petrácek, V
Pfeiffer, A
Rak, J
Ravinovich, I
Rehak, P
Richter, M
Sako, H
Schmitz, W
Schükraft, Jürgen
Sedykh, S
Seipp, W
Shimansky, S S
Slívova, J
Specht, H J
Stachel, J
Sumbera, M
Tilsner, H
Tserruya, Itzhak
Wessels, J P
Wienold, T
Windelband, B
Wurm, J P
Xie, W
Yurevich, S
Yurevich, V
author_facet Adamova, D
Agakichiev, G
Appelshäuser, H
Belaga, V
Braun-Munzinger, P
Cherlin, A
Damjanovic, S
Dietel, T
Dietrich, L
Drees, A
Esumi, S I
Filimonov, K
Fomenko, K
Fraenkel, Zeev
Garabatos, C
Glässel, P
Hering, G
Holeczek, J
Kushpil, V
Lenkeit, B C
Maas, A
Marin, A
Milosevic, J
Milov, A
Miskowiec, D
Panebratsev, Yu A
Petchenova, O Yu
Petrácek, V
Pfeiffer, A
Rak, J
Ravinovich, I
Rehak, P
Richter, M
Sako, H
Schmitz, W
Schükraft, Jürgen
Sedykh, S
Seipp, W
Shimansky, S S
Slívova, J
Specht, H J
Stachel, J
Sumbera, M
Tilsner, H
Tserruya, Itzhak
Wessels, J P
Wienold, T
Windelband, B
Wurm, J P
Xie, W
Yurevich, S
Yurevich, V
author_sort Adamova, D
collection CERN
description The CERES/NA45 experiment at the CERN SPS has previously measured e **+e**- pair production in 160 A center dot GeV Pb-Au collisions. In the mass region m greater than 0.2 GeV/c**2, an enhancement of 2.7 plus or minus 0.4(stat.) plus or minus 0.5(syst.) compared to the expectation from known hadronic decay sources was observed. In the 40 A center dot GeV data taken in 1999, an enhancement is again found; a preliminary analysis gives an even larger value of 5.0 plus or minus 1.3(stat.). The results are compared to theoretical model calculations based on pi**+ pi**- annihilation with a modified rho- propagator; they may be related to chiral symmetry restoration. 17 Refs.
id cern-643298
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2003
record_format invenio
spelling cern-6432982019-09-30T06:29:59Zdoi:10.1007/BF02707032http://cds.cern.ch/record/643298engAdamova, DAgakichiev, GAppelshäuser, HBelaga, VBraun-Munzinger, PCherlin, ADamjanovic, SDietel, TDietrich, LDrees, AEsumi, S IFilimonov, KFomenko, KFraenkel, ZeevGarabatos, CGlässel, PHering, GHoleczek, JKushpil, VLenkeit, B CMaas, AMarin, AMilosevic, JMilov, AMiskowiec, DPanebratsev, Yu APetchenova, O YuPetrácek, VPfeiffer, ARak, JRavinovich, IRehak, PRichter, MSako, HSchmitz, WSchükraft, JürgenSedykh, SSeipp, WShimansky, S SSlívova, JSpecht, H JStachel, JSumbera, MTilsner, HTserruya, ItzhakWessels, J PWienold, TWindelband, BWurm, J PXie, WYurevich, SYurevich, VLow-mass lepton pair production in Pb - Au collisions at 40 A $\cdot$ GeVNuclear PhysicsThe CERES/NA45 experiment at the CERN SPS has previously measured e **+e**- pair production in 160 A center dot GeV Pb-Au collisions. In the mass region m greater than 0.2 GeV/c**2, an enhancement of 2.7 plus or minus 0.4(stat.) plus or minus 0.5(syst.) compared to the expectation from known hadronic decay sources was observed. In the 40 A center dot GeV data taken in 1999, an enhancement is again found; a preliminary analysis gives an even larger value of 5.0 plus or minus 1.3(stat.). The results are compared to theoretical model calculations based on pi**+ pi**- annihilation with a modified rho- propagator; they may be related to chiral symmetry restoration. 17 Refs.oai:cds.cern.ch:6432982003
spellingShingle Nuclear Physics
Adamova, D
Agakichiev, G
Appelshäuser, H
Belaga, V
Braun-Munzinger, P
Cherlin, A
Damjanovic, S
Dietel, T
Dietrich, L
Drees, A
Esumi, S I
Filimonov, K
Fomenko, K
Fraenkel, Zeev
Garabatos, C
Glässel, P
Hering, G
Holeczek, J
Kushpil, V
Lenkeit, B C
Maas, A
Marin, A
Milosevic, J
Milov, A
Miskowiec, D
Panebratsev, Yu A
Petchenova, O Yu
Petrácek, V
Pfeiffer, A
Rak, J
Ravinovich, I
Rehak, P
Richter, M
Sako, H
Schmitz, W
Schükraft, Jürgen
Sedykh, S
Seipp, W
Shimansky, S S
Slívova, J
Specht, H J
Stachel, J
Sumbera, M
Tilsner, H
Tserruya, Itzhak
Wessels, J P
Wienold, T
Windelband, B
Wurm, J P
Xie, W
Yurevich, S
Yurevich, V
Low-mass lepton pair production in Pb - Au collisions at 40 A $\cdot$ GeV
title Low-mass lepton pair production in Pb - Au collisions at 40 A $\cdot$ GeV
title_full Low-mass lepton pair production in Pb - Au collisions at 40 A $\cdot$ GeV
title_fullStr Low-mass lepton pair production in Pb - Au collisions at 40 A $\cdot$ GeV
title_full_unstemmed Low-mass lepton pair production in Pb - Au collisions at 40 A $\cdot$ GeV
title_short Low-mass lepton pair production in Pb - Au collisions at 40 A $\cdot$ GeV
title_sort low-mass lepton pair production in pb - au collisions at 40 a $\cdot$ gev
topic Nuclear Physics
url https://dx.doi.org/10.1007/BF02707032
http://cds.cern.ch/record/643298
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