Title of article :
Event-by-event fluctuations of the mean transverse momentum in 40, 80, and 158 A GeV/c PbAu collisions
Original Research Article
Author/Authors :
CERES Collaboration، نويسنده , , D. Adamov?، نويسنده , , G. Agakichiev، نويسنده , , H. Appelshauser، نويسنده , , V. Belaga، نويسنده , , P. Braun-Munzinger، نويسنده , , Enzo R. Campagnolo، نويسنده , , A. Castillo، نويسنده , , A. Cherlin، نويسنده , , Svetozar S. Damjanovic، نويسنده , , T. Dietel، نويسنده , , L. Dietrich، نويسنده , , A. Drees، نويسنده , , S. Esumi، نويسنده , , K. Filimonov، نويسنده , , K. Fomenko، نويسنده , , Z. Fraenkel، نويسنده , , C. Garabatos، نويسنده , , P. Gl?ssel، نويسنده , , Janet G. Hering، نويسنده , , et al.، نويسنده ,
Abstract :
Measurements of event-by-event fluctuations of the mean transverse momentum in PbAu collisions at 40, 80, and 158 View the MathML source are presented. A significant excess of mean pT fluctuations at mid-rapidity is observed over the expectation from statistically independent particle emission. The results are somewhat smaller than recent measurements at RHIC. A possible non-monotonic behavior of the mean pT 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 μB under investigation, has not been observed. The centrality dependence of mean pT fluctuations in PbAu is consistent with an extrapolation from pp collisions assuming that the non-statistical fluctuations scale with multiplicity. The results are compared to calculations by the rqmd and urqmd event generators.
Keywords :
comparison to models , Short range correlations , Critical point , beam energy and centrality dependence , E=40 , 80 , deduced , 158 GeV/nucleon , event-by-event fluctuations of mean transverse momentum , X) , Nuclear reactions , 197Au(Pb , QCD phase transition
