Content area
Abstract
The effect of the final state Coulomb interaction on particles produced in Pb+Pb collisions at 158 AGeV/c has been investigated in the WA98 experiment through the study of the π-/π+ and K-/K+ ratios measured as a function of mT-m0. While the ratio for kaons shows no significant mT dependence, the π-/π+ ratio is enhanced at small mT-m0 values with an enhancement that increases with centrality. A silicon pad detector located near the target is used to estimate the contribution of hyperon decays to the π-/π+ ratio. The comparison of results with predictions of the RQMD model in which the Coulomb interaction has been incorporated allows to place constraints on the time of the pion freeze-out.
Details
Title
Pion freeze-out time in Pb+Pb collisions at 158 AGeV/c studied via π-/π+ and K-/K+ ratios
Author
Aggarwal, M M 1 ; Ahammed, Z 2 ; Angelis, ALS 3 ; Antonenko, V 4 ; Arefiev, V 5 ; Astakhov, V 5 ; Avdeitchikov, V 5 ; Awes, T C 6 ; Baba, PVKS 7 ; Badyal, S K 7 ; Bathe, S 8 ; Batiounia, B 5 ; Bernier, T 9 ; Bhalla, K B 10 ; Bhatia, V S 1 ; Blume, C 8 ; Bucher, D 8 ; Büsching, H 8 ; Carlen, L 11 ; Chattopadhyay, S 2 ; Decowski, M P 12 ; Delagrange, H 9 ; Donni, P 3 ; Majumdar, Dutta 2 ; K El Chenawi 11 ; Dubey, A K 13 ; Enosawa, K 14 ; Fokin, S 4 ; Frolov, V 5 ; Ganti, MS 2 ; Garpman, S 11 ; Gavrishchuk, O 5 ; Geurts, FJM 15 ; Ghosh, T K 16 ; Glasow, R 8 ; Guskov, B 5 ; ÅGustafsson, H 11 ; Gutbrod, H H 17 ; Hrivnacova, I 18 ; Ippolitov, M 4 ; Kalechofsky, H 3 ; Kamermans, R 15 ; Karadjev, K 4 ; Karpio, K 19 ; Kolb, B W 17 ; Kosarev, I 5 ; Koutcheryaev, I 4 ; Kugler, A 18 ; Kulinich, P 12 ; Kurata, M 14 ; Lebedev, A 4 ; Löhner, H 16 ; Luquin, L 9 ; Mahapatra, D P 13 ; Manko, V 4 ; Martin, M 3 ; Martínez, G 9 ; Maximov, A 5 ; Miake, Y 14 ; Mishra, G C 13 ; Mohanty, B 13 ; M-J Mora 9 ; Morrison, D 20 ; Mukhanova, T 4 ; Mukhopadhyay, D S 2 ; Naef, H 3 ; Nandi, B K 13 ; Nayak, S K 9 ; Nayak, T K 2 ; Nianine, A 4 ; Nikitine, V 5 ; Nikolaev, S 4 ; Nilsson, P 11 ; Nishimura, S 14 ; Nomokonov, P 5 ; Nystrand, J 11 ; Oskarsson, A 11 ; Otterlund, I 11 ; Pavliouk, S 5 ; Peitzmann, T 15 ; Peressounko, D 4 ; Petracek, V 18 ; Phatak, S C 13 ; Pinganaud, W 9 ; Plasil, F 6 ; Purschke, M L 17 ; Rak, J 18 ; Raniwala, R 10 ; Raniwala, S 10 ; Rao, N K 7 ; Retiere, F 9 ; Reygers, K 8 ; Roland, G 12 ; Rosselet, L 3 ; Roufanov, I 5 ; Roy, C 9 ; Rubio, J M 3 ; Sambyal, S S 7 ; Santo, R 8 ; Sato, S 14 ; Schlagheck, H 8 ; H-R Schmidt 17 ; Schutz, Y 9 ; Shabratova, G 5 ; Shah, TH 7 ; Sibiriak, I 4 ; Siemiarczuk, T 19 ; Silvermyr, D 11 ; Sinha, B C 2 ; Slavine, N 5 ; Söderström, K 11 ; Sood, G 1 ; Sørensen, S P 20 ; Stankus, P 6 ; Stefanek, G 19 ; Steinberg, P 12 ; Stenlund, E 11 ; Sumbera, M 18 ; Svensson, T 11 ; Tsvetkov, A 4 ; Tykarski, L 19 ; EC v d Pijll 15 ; Eijndhoven, N v 15 ; Nieuwenhuizen, GJ v 12 ; Vinogradov, A 4 ; Viyogi, Y P 2 ; Vodopianov, A 5 ; Vörös, S 3 ; Wysłouch, B 12 ; Young, G R 6
1 University of Panjab, Chandigarh, India
2 Variable Energy Cyclotron Centre, Calcutta, India
3 University of Geneva, Geneva 4, Switzerland
4 RRC Kurchatov Institute, Moscow, Russia
5 Joint Institute for Nuclear Research, Dubna, Russia
6 Oak Ridge National Laboratory, Oak Ridge, TN, USA
7 University of Jammu, Jammu, India
8 University of Münster, Münster, Germany
9 SUBATECH, Ecole des Mines, Nantes, France
10 University of Rajasthan, Jaipur, Rajasthan, India
11 Lund University, Lund, Sweden
12 MIT, Cambridge, MA, USA
13 Institute of Physics, Bhubaneswar, India
14 University of Tsukuba, Ibaraki, Japan
15 Universiteit Utrecht/NIKHEF, Utrecht, The Netherlands
16 KVI, University of Groningen, Groningen, The Netherlands
17 Gesellschaft für Schwerionenforschung (GSI), Darmstadt, Germany
18 Nuclear Physics Institute, Rez, Czech Republic
19 Institute for Nuclear Studies, Warsaw, Poland
20 University of Tennessee, Knoxville, TN, USA
1 University of Panjab, Chandigarh, India
2 Variable Energy Cyclotron Centre, Calcutta, India
3 University of Geneva, Geneva 4, Switzerland
4 RRC Kurchatov Institute, Moscow, Russia
5 Joint Institute for Nuclear Research, Dubna, Russia
6 Oak Ridge National Laboratory, Oak Ridge, TN, USA
7 University of Jammu, Jammu, India
8 University of Münster, Münster, Germany
9 SUBATECH, Ecole des Mines, Nantes, France
10 University of Rajasthan, Jaipur, Rajasthan, India
11 Lund University, Lund, Sweden
12 MIT, Cambridge, MA, USA
13 Institute of Physics, Bhubaneswar, India
14 University of Tsukuba, Ibaraki, Japan
15 Universiteit Utrecht/NIKHEF, Utrecht, The Netherlands
16 KVI, University of Groningen, Groningen, The Netherlands
17 Gesellschaft für Schwerionenforschung (GSI), Darmstadt, Germany
18 Nuclear Physics Institute, Rez, Czech Republic
19 Institute for Nuclear Studies, Warsaw, Poland
20 University of Tennessee, Knoxville, TN, USA
Pages
343-352
Publication year
2006
Publication date
Nov 2006
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2334228796
Copyright
The European Physical Journal C - Particles and Fields is a copyright of Springer, (2006). All Rights Reserved.