Author/Authors :
CERES Collaboration، نويسنده , , D. Adamova، نويسنده , , G. Agakichiev، نويسنده , , D. Antonczyk، نويسنده , , H. Appelshauser، نويسنده , , V. Belaga، نويسنده , , S. Bielcikova، نويسنده , , P. Braun-Munzinger، نويسنده , , O. Busch، نويسنده , , A. Cherlin، نويسنده , , Svetozar S. Damjanovic، نويسنده , , T. Dietel، نويسنده , , L. Dietrich، نويسنده , , A. Drees، نويسنده , , W. Dubitzky، نويسنده , , S.I. Esumi، نويسنده , , K. Filimonov، نويسنده , , K. Fomenko، نويسنده , , Z. Fraenkel، نويسنده , , C. Garabatos، نويسنده , , et al.، نويسنده ,
Abstract :
We present results on transverse momentum correlations of charged particle pairs produced in Pbsingle bondAu collisions at 158A 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 〈Δpt,i,Δpt,j〉 and the cumulative pt variable x(pt), 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.
Keywords :
Nuclear reactions , 197Au(Pb , Super proton synchrotron , Event-by-event fluctuations of transverse momentum , Long and short range correlations , QCD critical point , X) , Centrality and scale dependence
