Measurements of the elliptic and triangular azimuthal anisotropies in central ³He+Au, d+Au and p+Au collisions at \mbox√s_NN = 200 GeV

2022/10/20 by STAR Collaboration, Abdulhamid, M. I., Aboona, B. E. +343 · 1 citation
Mathematics · Physics and Astronomy · #Anisotropy #Azimuth #Eccentricity (behavior) #Elliptic flow #FOS: Physical sciences #Function (biology) #Hadron #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Optical properties and cooling technologies in crystalline materials #Particle physics #Physics #Quantum mechanics #Random Matrices and Applications #Rapidity #Transverse plane

paper · pdf · doi:10.48550/arxiv.2210.11352

published in arXiv (Cornell University) (Cornell University)

openalex publication_date 2022/10/20 · openalex created_date 2022/10/24 · openalex updated_date 2026/08/05

Abstract

The elliptic (v₂) and triangular (v₃) azimuthal anisotropy coefficients in central ³He+Au, d+Au, and p+Au collisions at \mbox√s_NN = 200 GeV are measured as a function of transverse momentum (p_T) at mid-rapidity (|η|<0.9), via the azimuthal angular correlation between two particles both at |η|<0.9. While the v₂(p_T) values depend on the colliding systems, the v₃(p_T) values are system-independent within the uncertainties, suggesting an influence on eccentricity from sub-nucleonic fluctuations in these small-sized systems. These results also provide stringent constraints for the hydrodynamic modeling of these systems.

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