New results on collectivity with CMS

2017/08/31 by J. Milošević, Milosevic, Jovan
Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.1708.09717

openalex publication_date 2017/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Nonlinear response coefficients of higher-order anisotropy harmonics for charged particles are measured in PbPb collisions at 2.76 and 5.02 TeV as a function of transverse momentum and collision centrality. The nonlinear response coefficients are obtained from v_n harmonics measured with respect to their own plane and the mixed harmonics. Additionally, at 5.02 TeV PbPb collisions, a significant negative skewness is observed by a fine splitting between v₂\4\ and v₂\6\ cumulants. The elliptic flow skewness is measured up to 60% centrality. The results are compared with hydrodynamic models with different shear viscosity to entropy density ratios and initial conditions.

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