- #1
silverwhale
- 84
- 2
Homework Statement
The lagrangian is given by:
[tex] L = \frac{1}{2} \partial_{\mu} \phi \partial^{\mu} \phi + \frac{\alpha}{2} \phi \partial_{\mu} \phi \partial^{\mu} \phi [/tex]
And the question is to find the feynman rules.
Homework Equations
The Attempt at a Solution
I started by using the generating functional with interaction terms method, but the calculation is huge and with it I get all the feynman graphs this Lagrangian can generate. But I am just interested in deriving the rules from the Lagrangian. How can I do that? I am clearly missing something, but what?