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Pion freeze-out time in Pb plus Pb collisions at 158 AGeV/c studied via pi(-)/pi(+) and K-/K+ ratios

Aggarwal, M. M.; Ahammed, Z.; Angelis, A. L. S.; Antonenko, V.; Arefiev, V.; Astakhov, V.; Avdeitchikov, V.; Awes, T. C.; Baba, P. V. K. S. and Badyal, S. K., et al. (2006) In European Physical Journal C. Particles and Fields 48(2). p.343-352
Abstract
The effect of the final state Coulomb interaction on particles produced in Pb + Pb collisions at 158AGeV/c has been investigated in the WA98 experiment through the study of the pi(-)/pi(+) and K-/K+ ratios measured as a function of T-m- (m)0. While the ratio for kaons shows no significant T-m dependence, the pi(-)/pi(+) ratio is enhanced at small T-m - (m)0 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 pi(-)/pi(+) 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.
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publication status
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in
European Physical Journal C. Particles and Fields
volume
48
issue
2
pages
343 - 352
publisher
Springer Berlin Heidelberg
external identifiers
  • wos:000249009900002
  • scopus:33845189854
ISSN
1434-6044
DOI
10.1140/epjc/s10052-006-0081-x
language
English
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yes
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ed32560c-7392-4788-b450-0477493ff2bf (old id 689045)
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2007-12-20 10:48:37
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@article{ed32560c-7392-4788-b450-0477493ff2bf,
  abstract     = {The effect of the final state Coulomb interaction on particles produced in Pb + Pb collisions at 158AGeV/c has been investigated in the WA98 experiment through the study of the pi(-)/pi(+) and K-/K+ ratios measured as a function of T-m- (m)0. While the ratio for kaons shows no significant T-m dependence, the pi(-)/pi(+) ratio is enhanced at small T-m - (m)0 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 pi(-)/pi(+) 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.},
  author       = {Aggarwal, M. M. and Ahammed, Z. and Angelis, A. L. S. and Antonenko, V. and Arefiev, V. and Astakhov, V. and Avdeitchikov, V. and Awes, T. C. and Baba, P. V. K. S. and Badyal, S. K. and Bathe, S. and Batiounia, B. and Bernier, T. and Bhalla, K. B. and Bhatia, V. S. and Blume, C. and Bucher, D. and Buesching, H. and Carlén, Lars and Chattopadhyay, S. and Decowski, M. P. and Delagrange, H. and Donni, P. and Majumdar, M. R. Dutta and El Chenawi, K. and Dubey, A. K. and Enosawa, K. and Fokin, S. and Frolov, V. and Ganti, M. S. and Garpman, Sten and Gavrishchuk, O. and Geurts, F. J. M. and Ghosh, T. K. and Glasow, R. and Guskov, B. and Gustafsson, Hans-Åke and Gutbrod, H. H. and Hrivnacova, I. and Ippolitov, M. and Kalechofsky, H. and Kamermans, R. and Karadjev, K. and Karpio, K. and Kolb, B. W. and Kosarev, I. and Koutcheryaev, I. and Kugler, A. and Kulinich, P. and Kurata, M. and Lebedev, A. and Lohner, H. and Luquin, L. and Mahapatra, D. P. and Manko, V. and Martin, M. and Martinez, G. and Maximov, A. and Miake, Y. and Mishra, G. C. and Mohanty, B. and Mora, M.-J. and Morrison, D. and Mukhanova, T. and Mukhopadhyay, D. S. and Naef, H. and Nandi, B. K. and Nayak, S. K. and Nayak, T. K. and Nianine, A. and Nikitine, V. and Nikolaev, S. and Nilsson, Pål and Nishimura, S. and Nomokonov, P. and Nystrand, Joakim and Oskarsson, Anders and Otterlund, Ingvar and Pavliouk, S. and Peitzmann, T. and Peressounko, D. and Petracek, V. and Phatak, S. C. and Pinganaud, W. and Plasil, F. and Purschke, M. L. and Rak, J. and Raniwala, R. and Raniwala, S. and Rao, N. K. and Retiere, F. and Reygers, K. and Roland, G. and Rosselet, L. and Roufanov, I. and Roy, C. and Rubio, J. M. and Sambyal, S. S. and Santo, R. and Sato, S. and Schlagheck, H. and Schmidt, H.-R. and Schutz, Y. and Shabratova, G. and Shah, T. H. and Sibiriak, I. and Siemiarczuk, T. and Silvermyr, David and Sinha, B. C. and Slavine, N. and Söderström, Kaj and Sood, G. and Sorensen, S. P. and Stankus, P. and Stefanek, G. and Steinberg, P. and Stenlund, Evert and Sumbera, M. and Svensson, Tomas and Tsvetkov, A. and Tykarski, L. and v. d. Pijll, E. C. and Eijndhoven, N. V. and Nieuwenhuizen, G. J. v. and Vinogradov, A. and Viyogi, Y. P. and Vodopianov, A. and Voeroes, S. and Wyslouch, B. and Young, G. R.},
  issn         = {1434-6044},
  language     = {eng},
  number       = {2},
  pages        = {343--352},
  publisher    = {Springer Berlin Heidelberg},
  series       = {European Physical Journal C. Particles and Fields},
  title        = {Pion freeze-out time in Pb plus Pb collisions at 158 AGeV/c studied via pi(-)/pi(+) and K-/K+ ratios},
  url          = {http://dx.doi.org/10.1140/epjc/s10052-006-0081-x},
  volume       = {48},
  year         = {2006},
}