Event-by-event fluctuations of the mean transverse momentum in 40, 80, and 158 AGeV/c Pb-Au collisions

Mostrar otras versiones (1)

Measurements of event-by-event fluctuations of the mean transverse momentum in Pb-Au collisions at 40, 80, and 158 AGeV/c are presented. A significant excess of mean $p_{T}$ fluctuations at midrapidity is observed over the expectation from statistically independent particle emission. The results are...

Descripción completa

Detalles Bibliográficos
Autores principales: Adamova, D, Agakichiev, G, Appelshäuser, H, Belaga, V, Braun-Munzinger, P, Campagnolo, R, Castillo, A, Cherlin, A, Damjanovic, S, Dietel, T, Dietrich, L, Drees, A, Esumi, S, Filimonov, K, Fomenko, K, Fraenkel, Zeev, Garabatos, C, Glässel, P, Hering, G, Holeczek, J, Kushpil, V, Lenkeit, B C, Ludolphs, W, Maas, A, Marin, A, Milosevic, J, Milov, A, Miskowiec, D, Musa, L, Panebratsev, Yu A, Petchenova, O Yu, Petracek, V, Pfeiffer, A, Rak, J, Ravinovich, I, Rehak, P, Richter, M, Sako, H, Schmitz, W, Schükraft, J, Sedykh, S, Seipp, W, Sharma, A, Shimansky, S S, Slivova, J, Specht, H J, Stachel, J, Sumbera, M, Tilsner, H, Tserruya, Itzhak, Wessels, J P, Wienold, T, Windelband, B, Wurm, J P, Xie, W, Yurevich, S, Yurevich, V
Lenguaje:eng
Publicado: 2003
Materias:
Nuclear Physics
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysa.2003.07.018
http://cds.cern.ch/record/909002
Descripción
Sumario:Measurements of event-by-event fluctuations of the mean transverse momentum in Pb-Au collisions at 40, 80, and 158 AGeV/c are presented. A significant excess of mean $p_{T}$ fluctuations at midrapidity is observed over the expectation from statistically independent particle emission. The results are somewhat smaller than recent measurements at RHIC. A possible nonmonotonic behavior of the mean $p_{T}$ fluctuations as function of collision energy, which may have indicated that the system has passed the critical point of the QCD phase diagram in the range of $\mu_{B}$ under investigation, has not been observed. The centrality dependence of mean $p_{T}$ fluctuations in Pb-Au is consistent with an extrapolation from $pp$ collisions assuming that the nonstatistical fluctuations scale with multiplicity. The results are compared to calculations by the RQMD and URQMD event generators.

Ejemplares similares