The Large Hadron Collider is latest member of CERN's collection of extraordinary high-energy facilities and is the world's largest and highest-energy accelerator. It occupies a 27 kilometer circumference circular tunnel near Geneva which overlaps the Swiss-French border, the same tunnel that contained the LEP. It is designed to produce proton-proton collisions. Successful particle beams were produced in the LHC in 2008 and in 2010 the two beams reached 3.5 TeV, half the target maximum for the accelerator. The Atlas bulletin of 2018 reported on data taken at 13 TeV.
Currently the work at the LHC is divided into six experiments denoted by the names ATLAS, CMS, ALICE, LHCb, TOTEM and LHCf.
A major objective for the LHC was the search for the Higgs boson. The Atlas and CMS detectors were major parts of that discovery and subsequent study.
Currently some excitement is being generated by results at the LHCb or "Beauty" detector, a portion of which is shown at left. A 0.8% imbalance between the decay rates of the D-meson and its antiparticle has been discovered.Though a small difference, it is a newly discovered difference between matter and antimatter and could contribute to the solution of the "antimatter problem" in cosmology.
References:
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