-
- Home
- Journals
- Pramana – Journal of Physics
- Volume 60
- Issue 5
-
Low-mass lepton pair production in Pb-Au collisions at 40 A.GeV
D Adamová G Agakichiev H Appelshäuser V Belaga P Braun-Munzinger A Cherlin S Damjanović T Dietel L Dietrich A Drees S I Esumi K Filimonov K Fomenko Z Fraenkel C Garabatos P Glässel G Hering J Holeczek V Kushpil B Lenkeit A Maas A Marín J Milosević A Milov D Miśkowiec Y Panebrattsev O Petchenova V Petrácek A Pfeiffer J Rak I Ravinovich P Rehak M Richter H Sako W Schmitz J Schukraft S Sedykh W Seipp S Shimansky J Slívová H J Specht J Stachel M Sumbera H Tilsner I Tserruya J P Wessels T Wienold B Windelband J P Wurm W Xie S Yurevich V Yurevich
Volume 60 Issue 5 May 2003 pp 1067-1072
-
-
Fulltext
Click here to view fulltext PDF
Permanent link:
https://www.ias.ac.in/article/fulltext/pram/060/05/1067-1072 -
Keywords
Heavy-ion collisions ;lepton pairs -
Abstract
The CERES/NA45 experiment at the CERN SPS has previously measurede+e- pair production in 160 A.GeV Pb-Au collisions. In the mass regionm > 02 GeV/c2, an enhancement of 2.7±04(stat.)±0.5(syst.) compared to the expectation from known hadronic decay sources was observed. In the 40 A.GeV data taken in 1999, an enhancement is again found; a preliminary analysis gives an even larger value of 50 ±13(stat.). The results are compared to theoretical model calculations based on π+π- annihilation with a modified ρ-propagator; they may be related to chiral symmetry restoration.
-
Author Affiliations
D Adamová1 G Agakichiev2 H Appelshäuser3 V Belaga4 P Braun-Munzinger2 A Cherlin5 S Damjanović3 T Dietel3 L Dietrich3 A Drees6 S I Esumi3 K Filimonov7 K Fomenko4 Z Fraenkel5 C Garabatos2 P Glässel3 G Hering2 J Holeczek2 V Kushpil1 B Lenkeit8 A Maas2 A Marín2 J Milosević3 A Milov5 D Miśkowiec2 Y Panebrattsev4 O Petchenova4 V Petrácek3 A Pfeiffer8 J Rak2 I Ravinovich5 P Rehak9 M Richter3 H Sako2 W Schmitz3 J Schukraft8 S Sedykh2 W Seipp3 S Shimansky4 J Slívová3 H J Specht3 J Stachel3 M Sumbera1 H Tilsner3 I Tserruya5 J P Wessels3 T Wienold3 B Windelband3 J P Wurm10 W Xie5 S Yurevich3 V Yurevich4
- NPI/ASCR, Reiz, Czech Republic
- GSI, Darmstadt, Germany
- Physikalisches Institut, Universität Heidelberg, Germany
- JINR, Dubna, Russia
- Weizmann Institute, Rehovot, Israel
- Department for Physics and Astronomy, SUNY Stony Brook, USA
- LBNL, Berkeley, USA
- CERN, Geneva, Switzerland
- Brookhaven National Laboratory, Upton, USA
- Max-Planck-Institut für Kernphysik, Heidelberg, Germany
-
Dates
- Published
- May 2003
-
-
Pramana – Journal of Physics
Volume 97, 2023
All articles
Continuous Article Publishing mode
-
Pramana – Journal of Physics | News
-
Editorial Note on Continuous Article Publication
Posted on July 25, 2019Click here for Editorial Note on CAP Mode
-