- #1
merrypark3
- 30
- 0
Homework Statement
I am not sure about the problem set up.
For (a), Using Equation of motion, need to express Lagrangian in terms of only J?
I got, [tex]L=-\frac{1}{2 \Box^2 }(\partial_\mu J_\nu)^2 - \frac{{J_\mu}^2}{\Box}[/tex], using lorentz gauge
(b) [tex] \partial_\mu J_\mu =0[/tex] means [tex]k_\mu J_\mu =0 ? [/tex]
For (d), I can't understand what it's asking. In momentum space, the term without time derivative is the first term in (a)??