Measurement of density correlations in pseudorapidity via charged particle multiplicity fluctuations in Au+Au collisions at s(NN)**(1/2) = 200-GeV - INSPIRE

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Measurement of density correlations in pseudorapidity via charged particle multiplicity fluctuations in Au+Au collisions at s(NN)**(1/2) = 200-GeV

PHENIX

Collaboration

Apr, 2007

32 pages

Published in:

Phys.Rev.C 76 (2007) 034903

e-Print:

0704.2894 [nucl-ex]

DOI:

10.1103/PhysRevC.76.034903

Experiments:

BNL-RHIC-PHENIX

View in:

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Abstract: (arXiv)

Longitudinal density correlations of produced matter in Au+Au collisions at sqrt(s_NN)=200 GeV have been measured from the inclusive charged particle distributions as a function of pseudorapidity window sizes. The extracted \alpha \xi parameter, related to the susceptibility of the density fluctuations in the long wavelength limit, exhibits a non-monotonic behavior as a function of the number of participant nucleons, N_part. A local maximum is seen at N_part ~ 90, with corresponding energy density based on the Bjorken picture of \epsilon_Bj \tau ~ 2.4 GeV/(fm^2 c) with a transverse area size of 60 fm^2. This behavior may suggest a critical phase boundary based on the Ginzburg-Landau framework.

Note:

331 authors, 32 pages text, RevTeX4, 7 figures, 27 tables. Submitted to Physical Review C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

25.75.Dw
nucleus nucleus: colliding beams
scattering: heavy ion
gold
nucleon nucleon: interaction
charged particle: multiple production
multiplicity: spectrum
quantum chromodynamics
critical phenomena
correlation: density

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