Student Friendly Introduction to QFT · Problem 7.13

QED: Quantum Field Interaction Theory Applied to Electromagnetism

Physics — QFT · wicks-theorem-two-fermions-t1-less-t2

Problem

Repeat Prob. 12 for

t_1 < t_2

. Hint: Near the end, use (4-146) of Chap. 4 and (7-75).