Large Hadron Collider

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For the pop group, see Les Horribles Cernettes
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Construction_of_LHC_at_CERN.jpg
CMS detector for LHC at CERN

The Large Hadron Collider (short LHC) is a particle accelerator and collider located at CERN. It is currently under construction and scheduled to start operation in 2007. It will become the world's largest particle accelerator. It uses the 27 km circumference tunnel created for the Large Electron Positron (LEP) collider. In contrast to the previous it will collide protons (one type of hadron particle) instead of electrons and positrons. The protons used will have an energy of 7 TeV each (total collision energy of 14 TeV). Five experiments will be built to utilize the LHC. Two of them, ATLAS and CMS are large, "general purpose" particle detectors. The other three (LHCb, ALICE, and TOTEM) are smaller and more specialized.

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Inside_the_CERN_LHC_tunnel.jpg
Inside the LHC tunnel. Superconducting magnets will be installed here

The LHC can also be used to collide heavy ions such as lead (Pb) (collision energy will be 1150 TeV).

Physicists hope to use the collider to answer the following questions:

  • What is mass? (We know how to measure it - but what is it?)
  • What's the origin of mass of particles? (In particular, does the Higgs Boson exist?)
  • What is the origin of mass of baryons? (By creating the quark-gluon plasma one will test the non-perturbative origin of a large fraction of the mass of the universe)
  • Are there additional violations of the symmetry between matter and antimatter?

See also

External links

fr:LHC he:מאיץ התנגשויות ההדרונים hu:Large Hadron Collider it:LHC pl:Wielki Zderzacz Hadronów pt:Grande Colisor de Hdrons sv:Large Hadron Collider

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