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Hard QCD processes

  1. Apr 13, 2010 #1
    What are Hard QCD processes ?
  2. jcsd
  3. Apr 14, 2010 #2
    hard means perturbative, i.e. processes which one can calculate using perturbation theory = momentum transfer is larger than around 250 GeV. At this energy, the QCD coupling constant becomes "large" so that perturbation theory is no longer valid.
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