Sprecher
Beschreibung
The oxygen-oxygen and neon-neon collisions provided by the LHC in the summer of 2025 have proved to be enormously scientifically fruitful. Clear signatures of energy loss have been observed in dijets. Hadron measurements also show signs of energy loss. It is of clear interest in Run 4 to further explore the transition between proton-lead collisions, where no energy loss signatures have been observed, and the region of the Run 3 measurements. In order to do this, we have run simulations using Glauber and Trento Monte Carlos of potential nuclei to collide, evaluated the transverse area of the potential collisions and compared them to those of existing collision systems. We will highlight areas that are particularly scientifically interesting. We also discuss luminosity requirements to make significant measurements. The feasibility of running this program and the impact of a second injector are also discussed.