Energy dependence of transverse momentum fluctuations in Pb+Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV

Results are presented on event-by-event fluctuations of transverse momenta $p_T$ in central Pb+Pb interactions at 20$A$, 30$A$, 40$A$, 80$A$ and 158$A$ GeV. The analysis was performed for charged particles at forward center-of-mass rapidity ($1.1 < y^{*}_{\pi} < 2.6$). Three fluctuation measur...

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Detalles Bibliográficos
Autores principales: Anticic, T, Baatar, B, Barna, D, Bartke, J, Betev, L, Bialkowska, H, Blume, C, Boimska, B, Botje, M, Bracinik, J, Buncic, P, Cerny, V, Christakoglou, P, Chung, P, Chvala, O, Cramer, J G, Csató, P, Dinkelaker, P, Eckardt, V, Fodor, Z, Foka, P, Friese, o V, Gál, J, Gazdzicki, M, Genchev, V, Gladysz-Dziadus, E, Grebieszkow, K, Hegyi, S, Höhne, C, Kadija, K, Karev, A, Kikola, D, Kolesnikov, V I, Kornas, E, Korus, R, Kowalski, M, Kreps, M, Laszlo, A, Lacey, R, Van Leeuwen, M, Lévai, Peter, Litov, L, Lungwitz, B, Makariev, M, Malakhov, A I, Mateev, M, Melkumov, G L, Mischke, A, Mitrovski, M, Molnár, J, Mrówczynski, S, Nicolic, V, Pálla, G, Panagiotou, A D, Panayotov, D, Petridis, A, Peryt, W, Pikna, M, Pluta, J, Prindle, D, Pühlhofer, F, Renfordt, R, Roland, C, Roland, G, Rybczynski, M, Rybicki, A, Sandoval, A, Schmitz, N, Schuster, T, Seyboth, P, Siklér, F, Sitár, B, Skrzypczak, E, Slodkowski, M, Stefanek, G, Stock, R, Strabel, C, Ströbele, H, Susa, T, Szentpétery, I, Sziklai, J, Szuba, M, Szymanski, P, Trubnikov, V, Utvic, M, Varga, D, Vassiliou, M, Veres, G I, Vesztergombi, G, Vranic, D, Wlodarczyk, Z, Wojtaszek, A, Yoo, I K
Lenguaje:eng
Publicado: 2008
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevC.79.044904
http://cds.cern.ch/record/1137431
Descripción
Sumario:Results are presented on event-by-event fluctuations of transverse momenta $p_T$ in central Pb+Pb interactions at 20$A$, 30$A$, 40$A$, 80$A$ and 158$A$ GeV. The analysis was performed for charged particles at forward center-of-mass rapidity ($1.1 < y^{*}_{\pi} < 2.6$). Three fluctuation measures were studied: the distribution of average transverse momentum ($M(p_T)$) in the event, the $\Phi_{p_{T}}$ fluctuation measure and two-particle transverse momentum correlations. Fluctuations of $p_T$ are small and show no significant energy dependence in the SPS energy range. Results are compared with QCD-inspired predictions for the critical point, and with the UrQMD model.

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