Correlations between azimuthal anisotropy Fourier harmonics $v_{ n}$ ($n = 2, 3, 4$) are studied using the events from PbPb collisions at $\sqrt{ s_{ _{ \mathrm{ NN}}}}=2.76$ TeV generated by the HYDJET++ and AMPT models, and compared to the corresponding experimental results obtained by the ATLAS Collaboration. The Fourier harmonics $v_{ n}$ are measured over a wide centrality range using the two-particle azimuthal correlation method. The slopes of the $v_{ 2}$--$v_{ 3}$ correlation from both models are in a good agreement with the ATLAS data. The HYDJET++ model predicts a stronger slope for the $v_{ 2}$--$v_{ 4}$ and $v_{ 3}$--$v_{ 4}$ correlations than the ones experimentally measured, while the results from the AMPT model are in a rather good agreement with the experimental results. In contrast to the HYDJET++ predictions, the AMPT model predicts a boomerang-like shape in the structure of the correlations as found in the experimental data.
Categories: nucl-th hep-ph