Hadronization geometry from net-charge angular correlations on momentum subspace (eta, phi) in Au-Au collisions at (root SNN)=130 GeV
Published in:
Physics Letters B 634,4 (2006) 347-355;
Abstract
We present the first measurements of charge-dependent correlations on angular difference variables eta(1) - eta(2) (pseudorapidity) and phi(1) - phi(2) (azimuth) for primary charged hadrons with transverse momentum 0.15 <= p(t) <= 2 GeV/c and vertical bar eta vertical bar <= 1.3 from Au-Au collisions at root(s)NN = 130 GeV. We observe correlation structures not predicted by theory but consistent with evolution of hadron emission geometry with increasing centrality from one-dimensional fragmentation of color strings along the beam direction to an at least two-dimensional hadronization geometry along the beam and azimuth directions of a hadron-opaque bulk medium. (c) 2006 Elsevier B.V. All rights reserved.
Keywords
net-charge correlations;; net-charge fluctuations;; hadronization;; heavy ion collisions;; by-event fluctuations;; dynamics
Date of this Version
January 2006