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Physics
Quantum Physics
Validity of Scalar Field Lagrangian with Linear and Quadratic Terms
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[QUOTE="Gaussian97, post: 6319032, member: 662184"] [B]TL;DR Summary:[/B] Is a term proportional to ##\phi## valid in a scalar Lagrangian? Hi, if I want to construct the most general Lagrangian of a single scalar field up to two fields and two derivatives, I usually see that is $$\mathscr{L} = \phi \square \phi + c_2 \phi^2$$ i.e. the Klein-Gordon Lagrangian. My question is, would be valid the Lagrangian $$\mathscr{L} = \phi \square \phi + c_1 \phi + c_2 \phi^2$$ ? [/QUOTE]
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Forums
Physics
Quantum Physics
Validity of Scalar Field Lagrangian with Linear and Quadratic Terms
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