Particle Physics
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CERN Large Hadron Collider to Restart Late 2009
Damage to CERN's Large Hadron Collider from the mishap shortly after it opened in September, 2008 required extensive repairs. The LHC will restart in late 2009.
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What Happened to the CERN Large Hadron Collider
Shortly after the CERN Large Hadron Collider accelerated its first protons, an accidental liquid He leak caused some magnets to warm up and necessitated repairs.
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Understanding Bosons and Fermions
The Higgs boson, aka the god particle, which physicists hope to detect with the new LHC, is the holy grail of modern particle physics. What are bosons and fermions?
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What Are Leptons
Leptons are a class of elementary subatomic particles, which includes electrons and neutrinos, that interact via the weak nuclear force.
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What Are Hadrons
Protons and other types of hadrons interact via the strong nuclear force. Hadrons are further classified into mesons and baryons.
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Can the CERN LHC Destroy Earth?
A calculation of the total energy density produced by protons in the Large Hadron Collider at CERN shows it is not likely to destroy Earth.
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Wave Particle Duality
Light and all types of subatomic elementary particle show properties of both waves and particles.
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Heisenberg Uncertainty Principle
Werner Heisenberg's uncertainty principle means that on a microscopic scale, we can know where something is or where it is going, but not both at the same time.
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The Photoelectric Effect
In addition to his work on relativity in 1905, Einstein published an explanation for the photoelectric effect that earned him the 1921 Nobel Prize.
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What Is a Neutrino?
Neutrinos are among the most elusive of elementary particles. They were not detected until about 25 years after they were first suggested to exist.
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