HEPData

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 $(\eta_{1},\eta_{2})$.
https://www.hepdata.net/record/data/966402yaml https://www.hepdata.net/record/data/966402/csvcsv
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 $(\phi_{1},\phi_{2})$.
https://www.hepdata.net/record/data/966403yaml https://www.hepdata.net/record/data/966403/csvcsv
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.
https://www.hepdata.net/record/data/966404yaml https://www.hepdata.net/record/data/966404/csvcsv
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.
https://www.hepdata.net/record/data/966405yaml https://www.hepdata.net/record/data/966405/csvcsv
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.
https://www.hepdata.net/record/data/966406yaml https://www.hepdata.net/record/data/966406/csvcsv
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.
https://www.hepdata.net/record/data/966407yaml https://www.hepdata.net/record/data/966407/csvcsv

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