Srednicki — Quantum Field Theory · Problem 10.3

Canonical Quantization of Scalar Fields — Mark Srednicki

Physics — QFT · feynman-rules-mixed-scalar-interaction

Problem

Consider a complex scalar field φ\varphi that interacts with a real scalar field χ\chi via L1=gχφ†φ\mathcal{L}_1 = g\chi\varphi^\dagger\varphi. Use a solid line for the φ\varphi propagator and a dashed line for the χ\chi propagator. Draw the vertex (remember the arrows!), and find the associated vertex factor.

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