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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...

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# Homework Help: Interaction scalar field invariance

Can you offer guidance or do you also need help?

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