Source radii at target rapidity from two-proton and two-deuteron correlations in central Pb+Pb collisions at 158 A GeV

Two-proton and two-deuteron correlations have been studied in the target fragmentation region of central Pb+Pb collisions at 158 A GeV. Protons and deuterons were measured with the Plastic Ball spectrometer of the WA98 experiment at the CERN SPS. The results of one-dimensional and multi-dimensional...

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Detalles Bibliográficos
Autores principales: 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., Busching, 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., Gustafsson, H.A., 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., Liu, H., Lohner, H., Luquin, L., Mahapatra, D.P., Manko, V., Martin, M., Martinez, G., Maximov, A., Miake, Y., Mishra, G.C., Mohanty, B., Mora, M.-J., Morrison, D., Moukhanova, 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., Pinanaud, 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., Soderstrom, K., Sood, G., Sorensen, S.P., Stankus, P., Stefanek, G., Steinberg, P., Stenlund, E., Sumbera, M., Svensson, T., Tsvetkov, A., Tykarski, L., van de Pijll, E.C., van Eijndhoven, N., van Nieuwenhuizen, G.J., Vinogradov, A., Viyogi, Y.P., Vodopianov, A., Voros, S., Wyslouch, B., Young, G.R.
Lenguaje:eng
Publicado: 2007
Materias:
Nuclear Physics
Acceso en línea:http://cds.cern.ch/record/1057325
Descripción
Sumario:Two-proton and two-deuteron correlations have been studied in the target fragmentation region of central Pb+Pb collisions at 158 A GeV. Protons and deuterons were measured with the Plastic Ball spectrometer of the WA98 experiment at the CERN SPS. The results of one-dimensional and multi-dimensional analyses using both the Bertsch-Pratt and Yano-Koonin-Podgoretsky parameterizations of the two-particle correlation functions are presented. The proton source exhibits a volume emission, while the deuteron source, with small outward radius, appears opaque. Both proton and deuteron sources have cross-terms R_{ol}^2 and longitudinal velocities beta consistent with zero, indicating a boost-invariant expansion. The invariant radius parameter R follows an approximate A/sqrt{m} scaling while the longitudinal and transverse radii, R_{L} and R_{T}, scale approximately as A/sqrt{m_{T}} with A ~ 3 fm GeV^{1/2} in both cases.

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