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Interaction of Particles

by Hluf
Tags: interaction, particles
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Hluf
#1
Apr29-14, 01:45 AM
P: 22
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.
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Simon Bridge
#2
Apr29-14, 02:24 AM
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P: 13,052
Because that is how you work it out.
Did you have another way in mind?
ChrisVer
#3
Apr29-14, 03:14 AM
P: 1,014
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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