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Quantum chromodynamics (abbreviated as QCD) is the theory of the strong interaction, a fundamental force describing the interactions of the quarks and gluons found in nucleons (such as the proton and the neutron). QCD is a quantum field theory of a special kind called a non-abelian gauge theory. It is an important part of the Standard Model of particle physics. A huge body of experimental evidence for QCD has been gathered over the years.

QCD enjoys two peculiar properties:

  • asymptotic freedom, which means that in very high-energy reactions, quarks and gluons interact very weakly. That QCD predicts this behavior was first discovered in the early 1970s by David Politzer and by Frank Wilczek and David Gross. For this work they were awarded the 2004 Nobel Prize in Physics.
  • confinement, which means that the force between quarks does not diminish as they are separated. Because of this, it would take an infinite amount of energy to separate two quarks; they are forever bound into hadrons such as the proton and the neutron. Although analytically unproven, confinement is widely believed to be true because it explains the consistent failure of free quark searches, and it is easy to demonstrate in lattice QCD.

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Frank Wilczek, an MIT professor, 2004 Nobel Prize in Physics, for work he did in his 20s on quantum chromodynamics: http://bit.ly/6w8uiM
Licinio (Julio Licinio) Tue, 29 Dec 2009 09:23:23 -0000
Frank Wilczek, an MIT professor, 2004 Nobel Prize in Physics, for work he did in his 20s on quantum chromodynamics: http://bit.ly/6w8uiM
A Conversation With Frank A. Wilczek - M.I.T. Professor and Nobelist for Quantum Chromodynamics Work - NYTimes.com http://bit.ly/7pM3Mb
nareshkumarhk (nareshkumarhk) Tue, 29 Dec 2009 06:23:53 -0000
A Conversation With Frank A. Wilczek - M.I.T. Professor and Nobelist for Quantum Chromodynamics Work - NYTimes.com http://bit.ly/7pM3Mb
Quantum Chromodynamics High Energy Experiments and Theory http://cli.gs/J4AX4
ecampusnet (Campus Net) Mon, 28 Dec 2009 19:40:21 -0000
Quantum Chromodynamics High Energy Experiments and Theory http://cli.gs/J4AX4
Dr. Mohammed Rahaman, D.Sc in Theoretical Astrophysics, Quantum Chromodynamics and Condensed Matter Physics. Goodnight.
mohammednasim (Mohammed Nasim) Sun, 27 Dec 2009 19:20:27 -0000
Dr. Mohammed Rahaman, D.Sc in Theoretical Astrophysics, Quantum Chromodynamics and Condensed Matter Physics. Goodnight.
Contemplating quantum chromodynamics...pfft, kidding. Contemplating how awesome this pastry is. And Baileys. Yummy Baileys.
meganemberlyn (Megan Emberlyn) Fri, 25 Dec 2009 22:03:05 -0000
Contemplating quantum chromodynamics...pfft, kidding. Contemplating how awesome this pastry is. And Baileys. Yummy Baileys.
Where quantum chromodynamics meets gravity - ‘In a theoretical paper recently made available at the arXiv,... http://tumblr.com/xe94yo62b
whoorderedthat (Who Ordered That?) Fri, 25 Dec 2009 17:19:45 -0000
Where quantum chromodynamics meets gravity - ‘In a theoretical paper recently made available at the arXiv,... http://tumblr.com/xe94yo62b

 
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