IMBT- Homework 3 Solved

Homework 3      
 

Second-order Feynman diagrams for the Green’s function : 

 

(a)   write the analytic expressions associated with diagrams (a), (b), and (c) in coordinate space; 

(b)  show that (c) and (d) are distinct diagrams; 

(c)   write the analytic expressions associated with diagram (c) in momentum space.