• Support PF! Buy your school textbooks, materials and every day products Here!

Peskin, Schroeder (2.30)

  • Thread starter Ratzinger
  • Start date
  • #1
287
0
Can someone tell me what the two commutators in (2.30) stand for? It has to be Dirac delta functions, but which one exactly?

thank you
 

Answers and Replies

  • #2
hellfire
Science Advisor
1,047
1
Acording to (2.29) the first one should be - [itex]\delta[/itex](p' + p) and the second [itex]\delta[/itex](p + p'). After substracting both the negative sign as well as the factor 2 cancel in (2.30). I guess you should then make use of:

[tex] \int \delta(p + p^{\prime}) F(p^{\prime}) dp^{\prime} = F(- p) [/tex]

to obtain the final result in (2.30).
 
  • #3
287
0
Thanks hellfire
 

Related Threads on Peskin, Schroeder (2.30)

Replies
2
Views
2K
Replies
1
Views
433
Top