Abstract
Abstract We present results from the PHENIX Experiment for Au+Au collisions with s NN = 7.9 , 19.6 , 27 , 39 , 62 , and 200 GeV . Measurements of the charged particle multiplicity at central rapidity scale linearly with the number of participant quarks for s NN = 62 GeV and above; for s NN = 27 GeV and below the multiplicity scales with the number of participant nucleons. For the HBT radii we perform a linear interpolation for radii from PHENIX, STAR, and ALICE to a m T = 0.26 GeV and calculate ratios and differences in quadrature at this value of the transverse mass. We observe a non-monotonic behavior near s NN = 19 GeV in the form of a peak in R o 2 − R s 2 and a dip in ( R s − 2 R ¯ ) / R l .
Highlights
The combination of a cross-over transition at T = 154 ± 9 MeV at zero baryon density calculated in LatticeQCD [1] and a first order phase transition at finite density suggested by chiral effective models implies the existence of a critical point in the QCD phase diagram [2]
RHIC has generated of baryon and charge fluctuations are expected to serve as the primary signatures of critical behavior, it is instructive to examine a full set of experimental signatures in order to fully explore the evolution and freeze-out of heavy ion collisions as a function temperature and baryon density
In this paper we present recent results on multiplicity scaling and HBT radii and their dependence on Au+Au collision energy as measured by the PHENIX Experiment
Summary
The combination of a cross-over transition at T = 154 ± 9 MeV at zero baryon density calculated in Lattice. QCD [1] and a first order phase transition at finite density suggested by chiral effective models implies the existence of a critical point in the QCD phase diagram [2]. The ongoing Beam Energy Scans (BES) at RHIC are designed to explore Au+Au regions of collisions high√baryon at sNN of density with the 7.7, 11.5, 19.6, goal of 27, 39, identifying signatures of the and 62 GeV. RHIC has generated of baryon and charge fluctuations are expected to serve as the primary signatures of critical behavior, it is instructive to examine a full set of experimental signatures in order to fully explore the evolution and freeze-out of heavy ion collisions as a function temperature and baryon density. In this paper we present recent results on multiplicity scaling and HBT radii and their dependence on Au+Au collision energy as measured by the PHENIX Experiment
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