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arXiv · 1611.09385

Degravitation of the Cosmological Constant in Bigravity

Moritz Platscher·Juri Smirnov
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Abstract

In this article the phenomenon of degravitation of the cosmological constant is studied in the framework of bigravity. It is demonstrated that despite a sizable value of the cosmological constant its gravitational effect can be only mild. The bigravity framework is chosen for this demonstration as it leads to a consistent, ghost-free theory of massive gravity. We show that degravitation takes place in the limit where the physical graviton is dominantly a gauge invariant metric combination. We present and discuss several phenomenological consequences expected in this regime.

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Moritz Platscher, Juri Smirnov. 2017-03-27. Degravitation of the Cosmological Constant in Bigravity. https://doi.org/10.1088/1475-7516%2F2017%2F03%2F051

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