Scale-dependence of transverse momentum correlations in Pb - Au collisions at 158A 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, tra...

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Detalles Bibliográficos
Autores principales: Adamová, D, Agakichiev, G, Antonczyk, D, Appelshäuser, H, Belaga, V, Bielcikova, S, Braun-Munzinger, P, Busch, O, Cherlin, A, Damjanovic, S, Dietel, T, Dietrich, L, Drees, A, Dubitzky, W, Esumi, S I, Filimonov, K, Fomenko, K, Fraenkel, Zeev, Garabatos, C, Glässel, P, Holeczek, J, Kushpil, V, Maas, A, Marín, A, Milosevic, J, Milov, A, Miskowiec, D, Panebratsev, Yu A, Petchenova, O, Petracek, V, Pfeiffer, A, Ploskon, M, Radomski, S, Rak, acn J, Ravinovich, I, Rehak, P, Sako, H, Schmitz, W, Sedykh, S, Shimansky, S, Stachel, J, Sumbera, M, Tilsner, H, Tserruya, Itzhak, Tsiledakis, G, Wessels, J P, Wienold, T, Wurm, J P, Xie, W, Yurevich, S, Yurevich, V
Lenguaje:eng
Publicado: 2008
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysa.2008.07.014
http://cds.cern.ch/record/1094724
Descripción
Sumario: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 $<\Delta p_{t,i}, \Delta p_{t,j}>$ 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.

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