Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2011-04-28
Phys.Lett.B701:654-659,2011
Physics
High Energy Physics
High Energy Physics - Theory
12 pages
Scientific paper
10.1016/j.physletb.2011.06.036
The theory of gravity with an auxiliary extra dimension is known to give the ghost-free cubic completion of the Fierz-Pauli mass term in the decoupling limit. Our work generalizes the boundary condition in the auxiliary dimension that avoids ghosts order-by-order, and to all orders, in the decoupling limit. Furthermore, we extend the formalism to the case of many auxiliary dimensions, and we show that the multi-dimensional extension with the rotationally invariant boundaries of the bulk, is equivalent to the model with a single auxiliary dimension. The above constructions require the appropriate adjustment of the boundary condition, which we discuss in detail. The other possible extension of the original model by the Gauss-Bonnet term is studied as well.
Berezhiani Lasha
Mirbabayi Mehrdad
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