Pion Freeze-Out Time in Pb+Pb Collisions at 158 A GeV/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.
- Badyal, S.K.
- Bathe, S.
- Batiounia, B.
- Bernier, T.
- Bhalla, K.B.
- Bhatia, V.S.
- Blume, C.
- Bucher, D.
- Büsching, H.
- Carlen, L.
- Chattopadhyay, S.
- Decowski, M.P.
- Delagrange, H.
- Donni, P.
- 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.
- Ghosh, T.K.
- Glasow, R.
- Guskov, B.
- Å.Gustafsson, H.
- Gutbrod, H.H.
- Hrivnacova, I.
- Ippolitov, M.
- Kalechofsky, H.
- Kamermans, R.
- Karadjev, K.
- Karpio, K.
- Kolb, B.W.
- Kosarev, I.
- Koutcheryaev, I.
- Kugler, A.
- Kulinich, P.
- Kurata, M.
- Lebedev, A.,
- Löhner, H.
- Luquin, L.
- Mahapatra, D.P.
- Manko, V.
- Martin, M.
- Martinez Garcia, Gines
- Maximov, A.
- Miake, Y.
- Mishra, G.C.
- Mohanty, B.
- Mora, M.-J.
- Morrison, D.
- Mukhanova, T.
- Mukhopadhyay, D.S.
- Naef, H.
- Nandi, B.K.
- Nayak, S.K.
- Nayak, T.K.
- Nianine, A.
- Nikitine, V.
- Nikolaev, S.
- Nilsson, P.
- Nishimura, S.
- Nomokonov, P.
- Nystrand, J.
- Oskarsson, A.
- Otterlund, I.
- Pavliouk, S.
- Peitzmann, T.
- 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.
- Santo, R.
- Sato, S.
- Schlagheck, H.
- Schmidt, H.-R.
- Schutz, Y.
- Shabratova, G.
- Shah, T.H.
- Sibiriak, I.
- Siemiarczuk, T.
- Silvermyr, D.
- Sinha, B.C.
- Slavine, N.
- Söderström, K.
- Sood, G.
- Sørensen, S.P.
- Stankus, P.
- Stefanek, G.
- Steinberg, P.
- Stenlund, E.
- 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.
- Wyslouch, B.
- Young, G.R.
DOIAbstract
9 pages, 12 figuresThe effect of the final state Coulomb interaction on particles produced in Pb+Pb collisions at 158 A GeV/c has been investigated in the WA98 experiment through the study of the pi-/pi+ and K-/K+ ratios measured as a function of transverse mass. While the ratio for kaons shows no significant transverse mass dependence, the pi-/pi+ ratio is enhanced at small transverse mass 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 freez...
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