Proton, deuteron and triton flow measurements in Au+Au collisions at $\sqrt{s_{NN}}$ = 2.4 GeV

High-precision measurements of flow coefficients $v_n$ (n = 1 - 4) for protons, deuterons and tritons relative to the first-order spectator plane have been performed in Au+Au collisions at $\sqrt{s_{NN}}$ = 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 p${}_t$ and rapidity y${}_{cm}$ 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 $v_1$, d$v_1$/dy${}^{\prime }$|${}_{y^{\prime }=0}$ where y${}^{\prime }$ is the scaled rapidity, and for $v_2$ at mid-rapidity. Scaling with the number of nucleons is observed for the p${}_t$ dependence of $v_2$ and $v_4$ at mid-rapidity, which is indicative for nuclear coalescence as the main process responsible for light nuclei formation. $v_2$ is found to scale with the initial eccentricity $⟨{ϵ}_2⟩$, while $v_4$ scales with $⟨{ϵ}_2{⟩}^2$ and $⟨{ϵ}_4⟩$. The multi-differential high-precision data on $v_1$, $v_2$, $v_3$, and $v_4$ provides important constraints on the equation-of-state of compressed baryonic matter.