Fractional Energy Loss and Centrality Scaling
Hwa, Rudolph C. · Yang, C. B.
Original · EN
The phenomenon of centrality scaling in the high- spectra of π⁰ produced in Au-Au collisions at √ s=200 GeV is examined in the framework of relating fractional energy loss to fractional centrality increase. A new scaling behavior is found where the scaling variable is given a power-law dependence on N part. The exponent γ specifies the fractional proportionality relationship between energy loss and centrality, and is a phenomenologically determined number that characterizes the nuclear suppression effect. The implication on the parton energy loss in the context of recombination is discussed.
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