Scale-dependence of transverse momentum correlations in Pb Au collisions at 158 A GeV / c

We present results on transverse momentum correlations of charged particle pairs produced in Pb Au collisions at 158 A GeV / c at the Super Proton Synchrotron. The transverse momentum correlations have been studied as a function of collision centrality, angular separation of the particle pairs, tran...

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Published in:Nuclear physics. A Vol. 811; no. 1; pp. 179 - 196
Main Authors: Adamová, D., Agakichiev, G., Antończyk, D., Appelshäuser, H., Belaga, V., Bielcikova, S., Braun-Munzinger, P., Busch, O., Cherlin, A., Damjanović, S., Dietel, T., Dietrich, L., Drees, A., Dubitzky, W., Esumi, S.I., Filimonov, K., Fomenko, K., Fraenkel, Z., Garabatos, C., Glässel, P., Holeczek, J., Kushpil, V., Maas, A., Marín, A., Milošević, J., Milov, A., Miśkowiec, D., Panebrattsev, Yu, Petchenova, O., Petráček, V., Pfeiffer, A., Płoskoń, M., Radomski, S., Rak, J., Ravinovich, I., Rehak, P., Sako, H., Schmitz, W., Sedykh, S., Shimansky, S., Stachel, J., Šumbera, M., Tilsner, H., Tserruya, I., Tsiledakis, G., Wessels, J.P., Wienold, T., Wurm, J.P., Xie, W., Yurevich, S., Yurevich, V.
Format: Journal Article
Language:English
Published: Elsevier B.V 01-10-2008
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Summary:We present results on transverse momentum correlations of charged particle pairs produced in Pb Au collisions at 158 A GeV / c at the Super Proton Synchrotron. The transverse momentum correlations have been studied as a function of collision centrality, angular separation of the particle pairs, transverse momentum and charge sign. We demonstrate that the results are in agreement with previous findings in scale-independent analyses at the same beam energy. Employing the two-particle momentum correlator 〈 Δ p t , i , Δ p t , j 〉 and the cumulative p t variable x ( p t ) , we identify, using the scale-dependent approach presented in this paper, different sources contributing to the measured correlations, such as quantum and Coulomb correlations, elliptic flow and mini-jet fragmentation.
ISSN:0375-9474
DOI:10.1016/j.nuclphysa.2008.07.014