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Hadronization geometry and charge-dependent number autocorrelations on axial momentum space in Au-Au collisions at s(NN)**(1/2) = 130-GeV

The STAR collaboration
Phys.Lett.B 634 (2006) 347-355, 2006.

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 $0.15 \leq p_t \leq 2$ GeV/$c$ and $|\eta| \leq 1.3$ 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.

  • Figure 1 a

    Data from Figure 1 (left panel)

    10.17182/hepdata.102088.v1/t1

    Normalized LS pair-number ratios $\widehat{r} [X(p_{t1}),X(p_{t2})]-1$ for collisions in centrality class (a) (most-central) in $(\eta_{1},\eta_{2})$.

  • Figure 1 b

    Data from Figure 1 (right panel)

    10.17182/hepdata.102088.v1/t2

    Normalized LS pair-number ratios $\widehat{r} [X(p_{t1}),X(p_{t2})]-1$ for collisions in centrality class (a) (most-central) in $(\phi_{1},\phi_{2})$.

  • Figure 2 a

    Data from Figure 2 a

    10.17182/hepdata.102088.v1/t3

    Two-particle CD joint autocorrelations $\widehat{N}(\widehat{r}-1)$ on $(\eta_{\Delta}, \phi_{\Delta})$ for most-central collisions.

  • Figure 2 b

    Data from Figure 2 b

    10.17182/hepdata.102088.v1/t4

    Two-particle CD joint autocorrelations $\widehat{N}(\widehat{r}-1)$ on $(\eta_{\Delta}, \phi_{\Delta})$ for mid-central collisions.

  • Figure 2 c

    Data from Figure 2 c

    10.17182/hepdata.102088.v1/t5

    Two-particle CD joint autocorrelations $\widehat{N}(\widehat{r}-1)$ on $(\eta_{\Delta}, \phi_{\Delta})$ for mid-peripheral collisions.

  • Figure 2 d

    Data from Figure 2 d

    10.17182/hepdata.102088.v1/t6

    Two-particle CD joint autocorrelations $\widehat{N}(\widehat{r}-1)$ on $(\eta_{\Delta}, \phi_{\Delta})$ for peripheral collisions.

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