HAL : in2p3-00159720, version 1
 arXiv : 0704.2894
 Physical Review C 76 (2007) 034903
 Measurement of density correlations in pseudorapidity via charged particle multiplicity fluctuations in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV
 PHENIX Collaboration(s)
 (2007)
 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.
 Thème(s) : Physique/Physique Nucléaire Expérimentale
 Lien vers le texte intégral : http://fr.arXiv.org/abs/0704.2894
 in2p3-00159720, version 1 http://hal.in2p3.fr/in2p3-00159720 oai:hal.in2p3.fr:in2p3-00159720 Contributeur : Jeanine Pellet <> Soumis le : Mardi 3 Juillet 2007, 18:39:55 Dernière modification le : Mardi 9 Octobre 2007, 13:13:28