Hi guys, have a very tricky question on my HW to find(adsbygoogle = window.adsbygoogle || []).push({}); compactgroup of global symmetry to this Lagrangian of2 complex scalar fields

[tex]L={\partial_\mu \phi_1^*}{\partial_\mu \phi_1}+{\partial_\mu \phi_2^*}{\partial_\mu \phi_2}-\lambda(\phi_1^* \phi_1 - \phi_2^* \phi_2 - v^2)^2[/tex]

and I can't figure it out because of the minus in potential part [tex]\phi_1^* \phi_1 - \phi_2^* \phi_2[/tex]

Do you have any ideas how to solve it?.

P.S. Of course there is U(1) group, but i think there should be something else.

Thank's.

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# CFD:Symmetry in Lagrangian

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