Collective flow and correlations measurements with HADES in Au+Au collisions at 1.23 AGeV

The HADES experiment provides a large acceptance combined with a high mass resolution and therefore makes it possible to study dielectron and hadron production in heavy-ion collisions with unprecedented precision. With the high statistics of seven billion Au+Au collisions at 1.23 AGeV recorded in 2012 the investigation of collective effects and particle correlations is possible with unprecedented accuracy. We present multi-differential data on directed (v₁) and elliptic (v₂) flow, and the first measurement of triangular flow (v₃), of protons and deuterons.