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Fourth derivative gravity in the auxiliary fields representation and application to the black hole stability

We consider an auxiliary fields formulation for the general fourth-order gravity on an arbitrary curved background. The case of a Ricci-flat background is elaborated in full details and it is shown that there is an equivalence with the standard metric formulation. At the same time, using auxiliary fields helps to make perturbations to look simpler and the results more clear. As an application we reconsider the linear perturbations for the classical Schwarzschild solution. We also briefly discuss the relation to the effect of massive unphysical ghosts in the theory.

preprint2015arXivOpen access
Sebastiao MauroRoberto BalbinotAlessandro FabbriIlya L. Shapiro
gr-qc
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Open access4 authors1 topic
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Sebastiao MauroRoberto BalbinotAlessandro FabbriIlya L. Shapiro

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