Long-range collectivity in small collision-systems with two- and four-particle correlations @ STAR

Abstract

New STAR differential and integral v{2,3} measurements that explicitly account for non-flow contributions are reported for p/d/3He+Au, collisions at Roots=200 GeV. The measurements, which leverage the two-particle correlators for p/d/3He+Au and minimum-bias p+p collisions in tandem with three well-established methods of non-flow subtraction, are observed to be method-independent. For comparable multiplicities, they further indicate system-independent v2{2} and v3{2} values that are consistent with the critical role of both size (N{ch}) and the subnucleonic-fluctuations-driven eccentricities e{2,3} but are inconsistent with the notion of shape engineering in p/d/3He+Au collisions. The scaling function derived from the measurements, confirm the important role of final-state effects across a broad spectrum of collision-system sizes and energies and suggests an increase in eta/s(T,muB) for small collision-systems.

Contribution to the proceedings of QM2019

References in corpus (4)

• 200 A GeV Au+Au collisions serve a nearly perfect quark-gluon liquid
• Triangularity and Dipole Asymmetry in Heavy Ion Collisions
• Anisotropic flow in sqrt(s)=2.76 TeV Pb+Pb collisions at the LHC
• Gradient expansion for anisotropic hydrodynamics

Cited by in corpus (5)

• Further developments of a multi-phase transport model for relativistic nuclear collisions
• The smallest fluid on earth
• The 3D structure of anisotropic flow in small collision systems at the Relativistic Heavy Ion Collider
• Rapidity dependence of initial state geometry and momentum correlations in p+Pb collisions
• Collision-System and Beam-Energy Dependence of Anisotropic Flow Fluctuations