Measurements of the Elliptic and Triangular Azimuthal Anisotropies in Central He+Au, 4+Au and p+Au Collisions at & RADIC;SNN=200 GeV br

The elliptic (v2) and triangular (v3) azimuthal anisotropy coefficients in central 3He thorn Au, d thorn Au, and p thorn Au collisions atffiffiffiffiffiffiffi p 1/4 200 GeV are measured as a function of transverse momentum (pT) at sNN midrapidity (j & eta;j < 0.9), via the azimuthal angular correlation between two particles both at j & eta;j < 0.9. While the v2opT thorn values depend on the colliding systems, the v3 opT thorn values are system independent within the uncertainties, suggesting an influence on eccentricity from subnucleonic fluctuations in these small -sized systems. These results also provide stringent constraints for the hydrodynamic modeling of these systems.

Automated summary

The elliptic (v2) and triangular (v3) azimuthal anisotropy coefficients in central 3He Au, d Au, and p Au collisions at p = 200 GeV are measured as a function of transverse momentum (pT) at midrapidity. The v2opT values depend on the colliding systems, while the v3opT values are system independent within the uncertainties, suggesting an influence on eccentricity from subnucleonic fluctuations in these small-sized systems. These results also provide stringent constraints for the hydrodynamic modeling of these systems.