PHENIX results on azimuthal correlations in small collision systems from the RHIC geometry and energy scan

Collective behavior in small collision systems has been explored in detail by the PHENIX experiment using the unique RHIC capability to collide different species at a variety of center-of-mass energies. Measurement of azimuthal anisotropies, v2(pt), and long-range two-particle correlations are studies in p+Al, p+Au, d+Au, and 3He+Au at 200 GeV with inclusive charged particles and identified pions and protons at mid-rapidity. The triangular anisotropy, v3(pt), is also measured in central d+Au, and 3He+Au collisions. The 2016 be am energy scan of d+Au collisions at 19.6, 39.0, 62.4, and 200 GeV provided a high-statistics data set that enabled multiparticle cumulant analyses of v2(2), v2(4), v2(6) as a function of event multiplicity, as well as the study of v2 of inclusive hadrons as a function of pseudorapidity over 6 units of eta. These measurements taken together provide a wealth of information sensitive to initial vs final state effects, nonflow and flow correlations, longitudinal and transverse partonic and hadronic dynamics. Detailed model comparisons with all observables will be discussed. (author)