Abstract
Longitudinal density correlations of produced matter in Au+Au collisions at GeV have been measured from the inclusive charged particle distributions as a function of pseudorapidity window sizes. The extracted parameter, related to the susceptibility of the density fluctuations in the long-wavelength limit, exhibits a nonmonotonic behavior as a function of the number of participant nucleons, . A local maximum is seen at , with corresponding energy density based on the Bjorken picture of GeV/(fm with a transverse area size of 60 fm. This behavior may suggest a critical phase boundary based on the Ginzburg-Landau framework.
- Received 22 April 2007
DOI:https://doi.org/10.1103/PhysRevC.76.034903
©2007 American Physical Society