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Is there the radion in the RS2 model?

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Smolyakov M., Volobuev I.
Open Physics
|
2004
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vol. 2
|
issue 1
25-34
EN
We analyse the physical boundary conditions at infinity for metric fluctuations and gauge functions in the RS2 model with matter on the brane. We argue that due to these boundary conditions the radion field cannot be gauged out in this case. Thus, it represents a physical degree of freedom of the model.
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Natural brane-confinement from massive Z 2-spontaneously broken Kaluza-Klein excitations in the bulk

100%
Dariescu M., Dariescu C., Romero C.
Open Physics
|
2009
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vol. 7
|
issue 4
690-695
EN
For a real scalar field minimally coupled to bulk gravity, in five dimensions, we analytically solve the Gordon equation, near one of the degenerated vacua of an effective potential with a spontaneously broken Z 2-symmetry. Dealing with the back-reaction from the excited massive modes on the whole scale function, we are pointing out that the lighter excitations of the scalar in the bulk turn more and more the warp function into the one of a partition on the confined brane.
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