Srednicki — Quantum Field Theory · Problem 60.3

Canonical Quantization of Scalar Fields — Mark Srednicki

Physics — QFT · spinor-helicity-amplitude-identity

Problem

Use various identities to show that eq. (60.31) can also be written as

\mathcal{T}_{+-+-} = -2e^2\,\frac{[1\,3]^2}{[1\,4][2\,4]} . \tag{60.42}