2016/01/26 by L. Adamczyk, STAR Collaboration, J. K. Adkins +426
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.1601.07052
openalex publication_date 2016/01/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We present measurements of 2nd order azimuthal anisotropy (v2) at mid-rapidity (|y|<1.0) for light nuclei d, t, 3He (for √sNN = 200, 62.4, 39, 27, 19.6, 11.5, and 7.7 GeV) and anti-nuclei \rm d (√sNN = 200, 62.4, 39, 27, and 19.6 GeV) and 3\rm He (√sNN = 200 GeV) in the STAR (Solenoidal Tracker at RHIC) experiment. The v2 for these light nuclei produced in heavy-ion collisions is compared with those for p and \rm p. We observe mass ordering in nuclei v2(pT) at low transverse momenta (pT<2.0 GeV/c). We also find a centrality dependence of v2 for d and \rm d. The magnitude of v2 for t and 3He agree within statistical errors. Light-nuclei v2 are compared with predictions from a blast wave model. Atomic mass number (A) scaling of light-nuclei v2(pT) seems to hold for pT/A < 1.5 GeV/c. Results on light-nuclei v2 from a transport-plus-coalescence model are consistent with the experimental measurements.