Scaling properties of fluctuation results from the PHENIX experiment at RHIC
Brookhaven National Laboratory, Building 510C, P.O. Box 5000, 11973-5000, Upton, NY, USA
Accepted: 30 November 2006
Published online: 22 March 2007
The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has made measurements of event-by-event fluctuations in the charged-particle multiplicity as a function of collision energy, centrality, collision species, and transverse momentum in several heavy-ion collision systems. It is observed that the fluctuations in terms of σ 2/μ 2 exhibit a universal power law scaling as a function of Nparticipants that is independent of the transverse momentum range of the measurement.
PACS: 25.75.-q Relativistic heavy-ion collisions – / 24.60.Ky Fluctuation phenomena –
© Società Italiana di Fisica and Springer-Verlag, 2007