- #1
paweld
- 255
- 0
I have a question concerning renormalization of QED. I don't know if
Feynman diagrams with counterterms on ecternal legs are allowed.
Normally to find S matrix amputated green function is necesary and to find
it one don't take into account all propagators on external legs - they
are canceled according to LSZ formula.
Feynman diagrams with counterterms on ecternal legs are allowed.
Normally to find S matrix amputated green function is necesary and to find
it one don't take into account all propagators on external legs - they
are canceled according to LSZ formula.