3
$\begingroup$

Why does the invariance of parity of QED indicate that gamma-5 can not appear in Feynman diagrams?

$\endgroup$

closed as unclear what you're asking by sammy gerbil, ZeroTheHero, AccidentalFourierTransform, Daniel Griscom, JamalS Apr 12 '18 at 12:24

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ The claim is false. As $\gamma_5^2=1$, you can always insert factors of $\gamma_5$ here and there. $\endgroup$ – AccidentalFourierTransform Mar 27 '18 at 15:52