I am having some problem with this attached question. I also attached my answer...(adsbygoogle = window.adsbygoogle || []).push({});

My problem is the appearence of the term:

[itex] 2 e (A \cdot \partial C) |\phi|^2 [/itex]

which shouldn't appear...but comes from cross terms of the:

[itex] A \cdot A \rightarrow ( A + \partial C) \cdot (A + \partial C) [/itex]

In my solution I write [itex]L \equiv L_1[/itex] in some point.

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# Introduction of the connection in Lagrangian for complex scalar field

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