Born-Infeld gravity with a massless graviton in four dimensions

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Guellue I., Sisman T. C. , TEKİN B.

PHYSICAL REVIEW D, cilt.91, sa.4, 2015 (SCI İndekslerine Giren Dergi) identifier identifier


We construct Born-Infeld (BI) type gravity theories which describe tree-level unitary (nonghost and nontachyonic) massless spin-2 modes around their maximally symmetric vacua in four dimensions. Building unitary BI actions around flat vacuum is straightforward, but this is a complicated task around (anti)-de Sitter backgrounds. In this work, we solve the issue and give details of constructing perturbatively viable determinantal BI theories. It is interesting that the Gauss-Bonnet combination, which is a total derivative in four dimensions, plays an important role in the construction of viable BI theories.