Fluctuations of the azimuthal particle distribution in NA49 at the CERN SPS

Details Fluctuations of the azimuthal particle distribution in NA49 at the CERN SPS Fluctuations of the azimuthal particle distribution in NA49 at the CERN SPS

2010-08-19

arxiv.org/abs/1008.3412v1

J.Phys.Conf.Ser.270:012023,2011

Physics

Nuclear Physics

Nuclear Experiment

Proceedings from Hot Quarks 2010,June 21-26

Scientific paper

10.1088/1742-6596/270/1/012023

Event-by-event fluctuations and correlations in azimuthal angle are currently widely investigated in various experiments. In this paper the $\Phi$ measure (earlier used in experiments to evaluate fluctuations in transverse momentum) is now applied to azimuthal angle $\phi$. Properties of this $\Phi_{\phi}$ function are investigated through fast generators and with complex models such as Pythia, Hijing, and UrQMD. Preliminary results of NA49 on $\Phi_{\phi}$ are also presented. The system size dependence (p+p, C+C, Si+Si and 6 centralities of Pb+Pb) at the highest SPS energy (158$A$ GeV) is shown, as well as the energy dependence (20$A$ - 158$A$ GeV) for the 7.2\% most central Pb+Pb interactions.

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