Interaction of Particles

  1. When we describe the amplitude of two interacting particles, we are integrating w.r.t the relative momentum of the particles. Why we do this?
    Thank you all of you.
     
  2. jcsd
  3. Simon Bridge

    Simon Bridge 15,280
    Science Advisor
    Homework Helper
    Gold Member

    Because that is how you work it out.
    Did you have another way in mind?
     
  4. ChrisVer

    ChrisVer 2,346
    Gold Member

    Because you integrate over the propagator momentum transfer... the propagator will propagate the momentum from one particle to the other, but its momentum transfer q can take any value....
    So you integrate over it to take all possible momenta??
    Maybe I;m wrong, without seeing the actual formula...
     
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