1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Interaction scalar field invariance

  1. Jun 25, 2010 #1
    The problem:

    http://www.gobigbang.nl/cft/cft.jpg

    An attempt of the solution:

    http://www.gobigbang.nl/cft/DSCN2722.JPG

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

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

    http://www.gobigbang.nl/cft/DSCN2724.JPG

    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
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted