Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2007-07-30
Physics
Nuclear Physics
Nuclear Experiment
To appear in the proceedings of the Lake Louise Winter Institute 2007. The proceedings of the institute will be published by W
Scientific paper
We present measurements of elliptic flow and event-by-event fluctuations established by the PHOBOS experiment. Elliptic flow scaled by participant eccentricity is found to be similar for both systems when collisions with the same number of participants or the same particle area density are compared. The agreement of elliptic flow between Au+Au and Cu+Cu collisions provides evidence that the matter is created in the initial stage of relativistic heavy ion collisions with transverse granularity similar to that of the participant nucleons. The event-by-event fluctuation results reveal that the initial collision geometry is translated into the final state azimuthal particle distribution, leading to an event-by-event proportionality between the observed elliptic flow and initial eccentricity.
for the PHOBOS Collaboration
Nouicer Rachid
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