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arXiv · 1008.3412

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

Tomasz Cetner·Katarzyna Grebieszkow
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Abstract

Event-by-event fluctuations and correlations in azimuthal angle are currently widely investigated in various experiments. In this paper the $Φ$ measure (earlier used in experiments to evaluate fluctuations in transverse momentum) is now applied to azimuthal angle $ϕ$. Properties of this $Φ_ϕ$ function are investigated through fast generators and with complex models such as Pythia, Hijing, and UrQMD. Preliminary results of NA49 on $Φ_ϕ$ 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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Tomasz Cetner, Katarzyna Grebieszkow. 2010-08-19. Fluctuations of the azimuthal particle distribution in NA49 at the CERN SPS. https://doi.org/10.1088/1742-6596%2F270%2F1%2F012023

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