Proton, deuteron and triton flow measurements in Au+Au collisions at √sNN=2.4 GeV

High-precision measurements of flow coefficients vn (n=1−4) for protons, deuterons and tritons relative to the first-order spectator plane have been performed in Au+Au collisions at sNN−−−√=2.4 GeV with the High-Acceptance Di-Electron Spectrometer (HADES) at the SIS18/GSI. Flow coefficients are studied as a function of transverse momentum pt and rapidity ycm over a large region of phase-space and for several classes of collision centrality. A clear mass hierarchy, as expected by relativistic hydrodynamics, is found for the slope of v1, dv1/dy′|y′=0 where y′ is the scaled rapidity, and for v2 at mid-rapidity. Scaling with the number of nucleons is observed for the pt dependence of v2 and v4 at mid-rapidity, which is indicative for nuclear coalescence as the main process responsible for light nuclei formation. v2 is found to scale with the initial eccentricity ⟨ϵ2⟩, while v4 scales with ⟨ϵ2⟩2 and ⟨ϵ4⟩. The multi-differential high-precision data on v1, v2, v3, and v4 provides important constraints on the equation-of-state of compressed baryonic matter.