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  • Pion freeze-out time in Pb ...
    Aggarwal, M. M.; Ahammed, Z.; Angelis, A. L. S.; Antonenko, V.; Arefiev, V.; Astakhov, V.; Awes, T. C.; Badyal, S. K.; Bathe, S.; Bernier, T.; Bhalla, K. B.; Bhatia, V. S.; Blume, C.; Bucher, D.; Carlén, Lars; Chattopadhyay, S.; Decowski, M. P.; Delagrange, H.; Majumdar, M. R. Dutta; El Chenawi, K.; Dubey, A. K.; Enosawa, K.; Fokin, S.; Frolov, V.; Ganti, M. S.; Gavrishchuk, O.; Geurts, F. J. M.; Glasow, R.; Guskov, B.; Gustafsson, Hans-Åke; Gutbrod, H. H.; Hrivnacova, I.; Ippolitov, M.; Karadjev, K.; Kolb, B. W.; Kugler, A.; Kurata, M.; Lebedev, A.; Lohner, H.; Mahapatra, D. P.; Manko, V.; Martin, M.; Martinez, G.; Miake, Y.; Mishra, G. C.; Mohanty, B.; Mora, M.-J.; Mukhanova, T.; Naef, H.; Nandi, B. K.; Nayak, S. K.; Nayak, T. K.; Nianine, A.; Nikitine, V.; Nikolaev, S.; Nilsson, Pål; Nishimura, S.; Nystrand, Joakim; Oskarsson, Anders; Otterlund, Ingvar; Peressounko, D.; Petracek, V.; Phatak, S. C.; Pinganaud, W.; Plasil, F.; Purschke, M. L.; Rak, J.; Raniwala, R.; Raniwala, S.; Rao, N. K.; Retiere, F.; Reygers, K.; Roland, G.; Rosselet, L.; Roufanov, I.; Roy, C.; Rubio, J. M.; Sambyal, S. S.; Sato, S.; Schlagheck, H.; Schmidt, H.-R.; Schutz, Y.; Sibiriak, I.; Siemiarczuk, T.; Sinha, B. C.; Slavine, N.; Söderström, Kaj; Sood, G.; Stankus, P.; Stefanek, G.; Stenlund, Evert; Sumbera, M.; Tsvetkov, A.; Tykarski, L.; v. d. Pijll, E. C.; Eijndhoven, N. V.; Vinogradov, A.; Vodopianov, A.; Voeroes, S.; Wyslouch, B.

    The European physical journal. C, Particles and fields, 11/2006, Volume: 48, Issue: 2
    Journal Article

    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.