Physics at the high-luminosity LHC

The High-Luminosity LHC (HL-LHC) is scheduled to start operation in 2027. By the end of the 2030s it is expected to deliver to upgraded LHC experiments a factor20 more data than collected so far. To further refine the expectations of the physics potential of the HL-LHC, the Workshop on the Physics of the HL-LHC and Perspectives for the HE-LHC took place from October 2017 to December 2018. The whole LHC community, theorists and experimentalists, collaborated closely and produced detailed studies of HL-LHC measurements towards ultimate precision, and of searches for new phenomena. The updated experimental projections are generally based on recent publications of the LHC Run-2 data. The results are presented in a comprehensive document). An executive summary of the report was also submitted to the European Particle Physics Strategy Group). Here, a small selection of the projections of the physics at the HL-LHC is presented.