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Gauge invariance & mass shell amplitudes & pdfs

  1. Jun 13, 2012 #1
    What is means that unintegrated parton distributions and matrix elements are supposed to be gauge invariant??
     
  2. jcsd
  3. Jun 13, 2012 #2

    tom.stoer

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    Science Advisor

    All observables must be gauge invariant
     
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