Compact Linear Collider

The Compact Linear Collider (CLIC) is a study for a high-energy and high- collider carried out by a world-wide collaboration. It aims at accelerating and colliding electrons and positrons at a nominal energy of 3 TeV, which is an energy scale never reached by any existing lepton collider. As of February 2012, 43 institutes from 22 countries are participating in the project.

CLIC is in competition with the International Linear Collider project.

The Large Hadron Collider (LHC), the most powerful existing high-energy particle collider, is able to perform proton/proton collisions at a maximal energy of 14 TeV. Since protons are not elementary particles, and consist of quarks, gluons and , the center-of-mass energy of elementary particle collisions in the LHC, beside being much lower than 14 TeV, cannot be precisely determined. The absence of precise knowledge of a collision’s initial conditions makes the analysis of the data collected at the LHC very challenging. On the other hand, electrons and positrons are elementary particles, so
e+

e−
colliders can be used to determine parameters with a much higher precision than proton colliders.

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