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Inclusice & Exclusive processes?

  1. Feb 23, 2010 #1
    Dear all,

    I have encountered many times in litterature phrases "Inclusice process/ cross section" and exclusive dito.

    What does all of this mean?

    Greetings
     
  2. jcsd
  3. Feb 23, 2010 #2
    Greeting,

    it is perhaps easier to define an exclusive process : all particles in the final state are measured/detected/known. The prototype of inclusive process is deep inelastic scattering, for which one measures only the recoiling lepton off a nucleon, and sums over all possible hadronic final states.

    Note that there are semi-inclusive processes, whereupon one will measure in addition another. For instance in semi-inclusive DIS, in addition to the lepton one detects another recoiling particle, such as (say for instance) a pion.

    Finally, let me note that in exclusive processes, one may not actually detect one of the particles, but constraint kinematically the other particles in such a manner to ensure the only possible undetected recoil to be known.
     
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