Recent content by BradC

Hi Sam, Thanks, I thought the reason for the sum a connection to group theory. I went back and reviewed my group theory and tried the same exercise as you suggested. This helps. thanks again!

Hi Sam, THANKS! Sorry I made a mess of it. I do want to thank you for taking the time to clear this all up for me, I learned a few things from your writeup. I think I've got it now, but I may have a question or two in a few days. One quick question is there a particular reason why you do...

To show more of my work, so someone can help me figure out the gap in my knowledge. I'm trying to solve "spin 2 massive propagator." Exercise 1.5.1 chapter I.5 on page39 in A. Zee "QFT in a nutshell" 2nd edition in I know I’m missing something very simple (self-taught beginner). I created...

In A. Zee "QFT in a nutshell" in chapter I.5 Exercise 1.5.1 on page 39 for spin 2 massive propagator. I know I’m missing something very simple (self-taught beginner). I'm trying to derive equation (13) on page 35, which is G_{\mu\nu,\lambda\sigma} = G_{\mu\lambda}G_{\nu\sigma} +...