Srednicki — Quantum Field Theory · Problem 10.4

Canonical Quantization of Scalar Fields — Mark Srednicki

Physics — QFT · derivative-coupling-vertex-factor

Problem

Consider a real scalar field with

\mathcal{L}_1 = \frac{1}{2}g\varphi\partial^\mu\varphi\partial_\mu\varphi

. Find the associated vertex factor.