The Compact Linear Collider, CLIC, is a proposed e+eβ collider at the
TeV scale whose physics potential ranges from high-precision measurements to
extensive direct sensitivity to physics beyond the Standard Model. This
document summarises the physics potential of CLIC, obtained in detailed
studies, many based on full simulation of the CLIC detector. CLIC covers one
order of magnitude of centre-of-mass energies from 350 GeV to 3 TeV, giving
access to large event samples for a variety of SM processes, many of them for
the first time in e+eβ collisions or for the first time at all. The high
collision energy combined with the large luminosity and clean environment of
the e+eβ collisions enables the measurement of the properties of Standard
Model particles, such as the Higgs boson and the top quark, with unparalleled
precision. CLIC might also discover indirect effects of very heavy new physics
by probing the parameters of the Standard Model Effective Field Theory with an
unprecedented level of precision. The direct and indirect reach of CLIC to
physics beyond the Standard Model significantly exceeds that of the HL-LHC.
This includes new particles detected in challenging non-standard signatures.
With this physics programme, CLIC will decisively advance our knowledge
relating to the open questions of particle physics.Comment: Input to the European Particle Physics Strategy Update on behalf of
the CLIC and CLICdp Collaboration