Hydrodynamic modeling of 3He-Au collisions at sqrt(sNN)=200 GeV

TL;DR

This paper uses 3+1D viscous hydrodynamics to analyze collective flow and femtoscopy in ultrarelativistic 3He-Au collisions at 200 GeV, revealing long-range correlations and collective behavior.

Contribution

It provides the first detailed hydrodynamic modeling of 3He-Au collisions, predicting flow coefficients and femtoscopy radii consistent with experimental data.

Findings

Observation of long-range ridge structures in correlations.

Elliptic and triangular flow coefficients as functions of transverse momentum.

Predicted decrease of femtoscopy radii with pion pair transverse momentum.

Abstract

Collective flow and femtoscopy in ultrarelativistic 3He-Au collisions are investigated within the 3+1-dimensional (3+1D) viscous event-by-event hydrodynamics. We evaluate elliptic and triangular flow coefficients as functions of the transverse momentum. We find the typical long-range ridge structures in the two-particle correlations in the relative azimuth and pseudorapidity, in the pseudorapidity directions of both Au and 3He. We also make predictions for the pionic interferometric radii, which decrease with the transverse momentum of the pion pair. All features found hint on collectivity of the dynamics of the system formed in 3He-Au collisions, with hydrodynamics leading to quantitative agreement with the up-to-now released data.