Collision centrality evolution of the longitudinal and azimuthal widths of the $G_{2}^{\rm CI}$ and $G_{2}^{\rm CD}$ correlators in Pb–Pb collisions at $\sqrt{s_{\rm{NN}}} = 2.76\;\text{TeV}$ compared to HIJING and AMPT model expectations.
Top panels: collision centrality evolution of the longitudinal (left) and azimuthal (right) widths of the $G_{2}^{\rm CI}$ and $G_{2}^{\rm CD}$ correlators measured in Pb–Pb collisions at $\sqrt{s_{\rm{NN}}} = 2.76\;\text{TeV}$. Central and bottom panels: width evolution relative to the value in the most peripheral collisions of the two-particle transverse momentum correlations $G_{2}^{\rm CI}$ (central) and $G_{2}^{\rm CD}$ (bottom) along the longitudinal (left) and azimuthal (right) dimensions. Data are compared to HIJING and AMPT model expectations. In data, vertical bars and shaded bands represent statistical and systematic uncertainties, respectively. For models, shaded bands represent statistical uncertainties.