Srednicki — Quantum Field Theory · Problem 45.2

Canonical Quantization of Scalar Fields — Mark Srednicki

Physics — QFT · feynman-rules-dirac-fields-scattering-amplitudes

Problem

Use the Feynman rules to write down (at tree level)

i\mathcal{T}

for the processes

e^+e^+ \to e^+e^+

and

\varphi\varphi \to e^+e^-