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Homework Help: Interaction scalar field invariance

  1. Jun 25, 2010 #1
    The problem:


    An attempt of the solution:


    My problem is question c. I don't have a clue how to see that the improved current is conserved... Can anyone help me?

    I managed to solve the question by using the Euler-Lagrange equations, up to a minus sign... can anyone see the minus sign mistake?


    Found it: actually if you change the sign of the current J or the term F, everything comes out nicely... So somewhere in those terms should be a mistake in the minus sign...
    Last edited: Jun 25, 2010
  2. jcsd
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