The DK Summer School 2023 will take place in Oberaichwald at Hoteldorf Schönleitn (Dorfstraße 26, 9582 Oberaichwald, Kärnten, Österreich). Speakers: David Dobrigkeit Chinellato (CERN): Heavy ion collisions and the ALICE experiment Laura Donnay (SISSA): Celestial amplitudes Edmond Iancu (IPhT Saclay): Probing the quark gluon plasma with jets Andreas Schmitt (Univ. Southampton): Dense matter and compact…