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Z[J] and cross section

  1. May 20, 2010 #1
    Hey folks,

    i am currently making myself familiar with the path integral in high energy physics by reading Lewis Ryder's QFT book. I do have a question however, since i do not really understand the connection between the path integral and the cross section of a process. Are they only related to each other via the LSZ-reduction formula or is there some other way?

  2. jcsd
  3. May 20, 2010 #2
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