Srednicki — Quantum Field Theory · Problem 88.4

Canonical Quantization of Scalar Fields — Mark Srednicki

Physics — QFT · standard-model-lepton-sector

Problem

Compute

\langle|\mathcal{T}|^2\rangle

for muon decay using eq.\,(88.36), without making the Fierz transformation to eq.\,(88.37), and verify eq.\,(88.41).