Hi everyone. I was trying to reproduce the calculation needed to include the QCD correction to the low energy electroweak Lagrangian. In particular I am looking at Peskin section 18.2. In equation 18.35 an extra minus sign appears on the numerator of the second fermion propagator.(adsbygoogle = window.adsbygoogle || []).push({});

Can anyone explain me why?

Thanks

**Physics Forums - The Fusion of Science and Community**

# Doubt on sign of the propagator on Peskin

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: Doubt on sign of the propagator on Peskin

Loading...

**Physics Forums - The Fusion of Science and Community**