Recent content by szg138

hi everyone, I have been trying to understand gauge theory. I am familiar with the Noether's theorem applied in the context of simpler textbook cases like poincare invariant Lagrangians. This is my question: Are there Noether currents corresponding to the local gauge symmetries too and would...

Ignore my previous post. Equation 13.12 is correct. Heres the explanation: rho(s) is invariant under Lorentz transformation because, we have summed over all the possibilities for n. Since rho is invariant under LorentzTransformations, it can depend only on k^2=k_\mu \eta^{\mu\nu}...

I am new to the Physics forum, so I appologise if I doing something wrong by digging up an old thread. I too got stuck at this proof for a while. Now I think I have figured out the correction to the proof. I thought I will share it with others. There seems to be a mistake in the proof. But the...