Question

Show that the spin-averaged interference term between the two Feynman diagrams for electron-electron scattering is that shown in the table.

   Show that the spin-averaged interference term between the two Feynman diagrams for electron-electron scattering is that shown in the table.

Quarks and leptons: introductory course in modern particle physics

Quarks and leptons: introductory course in modern particle physics

Francis Halzen, Alan… 1st Edition

Chapter 6, Problem 6

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Step 1

There are two leading-order diagrams to consider: one where the electrons exchange a virtual photon directly (s-channel), and another where one electron emits a virtual photon which is then absorbed by the other electron (t-channel). Show more…

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Show that the spin-averaged interference term between the two Feynman diagrams for electron-electron scattering is that shown in the table.

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