Hadronization geometry from net-charge angular correlations on momentum subspace ($\eta ,\varphi$) in Au-Au collisions at $\sqrt{s_{NN}}=130$ GeV

Abstract

We present the first measurements of charge-dependent correlations on angular difference variables ${\eta }_1-{\eta }_2$ (pseudorapidity) and ${\varphi }_1-{\varphi }_2$ (azimuth) for primary charged hadrons with transverse momentum $0.15\le p_t\le 2$ GeV/$c$ and $|\eta |\le 1.3$ from Au-Au collisions at $\sqrt{s_{NN}}=130$ 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.

8 pages, 4 figures

References in corpus (1)

• Autocorrelations from fluctuation scale dependence by inversion

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