FEATURES24 EPN 49/1 T he Higgs boson, the last pillar of the Standard Model of Particle Physics (SM), was discovered at the Large Hadron Collider (LHC) in 2012. Up to now, no direct signs for new physics beyond the Standard Model (BSM) were found at the LHC. Yet there are phenomena such as the matter-antimatter asymmetry, governing mechanisms at the early universe, or dark matter that cannot be explained within the existing SM. With the recently approved High-Luminosity upgrade of the LHC (HL-LHC), which will record collision data until ~2038, more than 10 times more statistics can be collected such that signs of potential new physics could still be revealed in the coming years. Following a complementary approach, several future collider projects using collisions between electrons and positrons instead of collisions between protons are currently proposed for the time after the HL-LHC. These colliders focus on precision measurements of the Higgs boson and the top quark. Here, new physics could manifest itself via deviations from SM expectations. The Compact Linear Collider (CLIC) is one of these proposed future colliders. CLIC would provide a guaranteed physics programme of precision measurements of the Higgs boson and the top quark, the heaviest particle in the SM. CLIC would also be a powerful tool to perform both direct and indirect searches for new physics processes, complementary to the HL-LHC programme. CLIC is conceived as a staged machine with centreof-mass energies ranging from 380 GeV up to 3 TeV, with a corresponding accelerator length from 11 to 50 km, respectively. The collision energy of CLIC can be The Compact Linear Collider (CLIC), a future electron-positron collider at the energy frontier, has the potential to change our understanding of the universe. Proposed to follow the Large Hardron Collider (LHC) programme at CERN, it is conceived for precision measurements as well as for searches for new phenomena.
TOWARDS TEV-SCALE ELECTRON-POSITRON COLLISIONS COMPACT LINEAR COLLIDER (CLIC)l. ©cERN