Phenomenological study on correlation between flow harmonics and mean transverse momentum in nuclear collisions

2021/08/25 by Zhang, Chunjian, Jia, Jiangyong, Huang, Shengli
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2108.11452

Abstract

To assess the properties of the quark-gluon plasma formed in nuclear collisions, the Pearson correlation coefficient between flow harmonics and mean transverse momentum, ρ(v_n²,[p_T]), reflecting the overlapped geometry of colliding atomic nuclei, is measured. ρ(v₂²,[p_T]) was found to be particularly sensitive to the quadrupole deformation of the nuclei. We study the influence of the nuclear quadrupole deformation on ρ(v_n²,[p_T]) in \rmAu+Au and \rmU+U collisions at RHIC energy using \rmAMPT transport model, and show that the ρ(v₂²,[p_T]) is reduced by the prolate deformation β₂ and turns to change sign in ultra-central collisions (UCC).

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