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  • Pion freeze-out time in Pb+...
    Ahammed, Z.; Antonenko, V.; Arefiev, V.; Astakhov, V.; Baba, P.V.K.S.; Badyal, S.K.; Bathe, S.; Bernier, T.; Bhalla, K.B.; Bhatia, V.S.; Blume, C.; Bucher, D.; Büsching, H.; Carlen, L.; Chattopadhyay, S.; Decowski, M.P.; Delagrange, H.; Dutta Majumdar, M.R.; El Chenawi, K.; Dubey, A.K.; Enosawa, K.; Fokin, S.; Frolov, V.; Ganti, M.S.; Garpman, S.; Gavrishchuk, O.; Geurts, F.J.M.; Glasow, R.; Guskov, B.; Å.Gustafsson, H.; Gutbrod, H.H.; Hrivnacova, I.; Ippolitov, M.; Kolb, B.W.; Kugler, A.; Kurata, M.; Lebedev, A.; Löhner, H.; Mahapatra, D.P.; Manko, V.; Martin, M.; Martínez, G.; Miake, Y.; Mishra, G.C.; Mohanty, B.; Mora, M.-J.; Mukhanova, T.; Naef, H.; Nandi, B.K.; Nayak, T.K.; Nianine, A.; Nikitine, V.; Nikolaev, S.; Nilsson, P.; Nishimura, S.; Nystrand, J.; Oskarsson, A.; Otterlund, I.; 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.; Sato, S.; Schlagheck, H.; Schmidt, H.-R.; Schutz, Y.; Shah, T.H.; Sibiriak, I.; Siemiarczuk, T.; Silvermyr, D.; Slavine, N.; Sood, G.; Sørensen, S.P.; Stankus, P.; Stefanek, G.; Sumbera, M.; Svensson, T.; Tsvetkov, A.; Tykarski, L.; v. d. Pijll, E.C.; v. Eijndhoven, N.; v. Nieuwenhuizen, G.J.; Vinogradov, A.; Viyogi, Y.P.; Vodopianov, A.; Vörös, S.; Young, G.R.

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

    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.