Primordial Tensor Non-Gaussianity from Massive Gravity

Abstract

We calculate tensor bispectrum in a theory of massive tensor gravitons which predicts blue-tilted and largely amplified primordial gravitational waves. We find that a new 3-point interaction can produce a larger tensor bispectrum than the conventional one from general relativity. The bispectrum peaks at the squeezed configuration and its slope towards the squeezed limit is determined by the graviton mass. This squeezed tensor bispectrum may be observed as the quadrupolar modulation of the tensor power spectrum by interferometers.

21 pages, 4 figures

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Cited by in corpus (8)

• Primordial Gravitational Waves from Galaxy Intrinsic Alignments
• Generation of Primordial Black Holes and Gravitational Waves from Dilaton-Gauge Field Dynamics
• Interferometer Constraints on the Inflationary Field Content
• Spin-2 dark matter from anisotropic Universe in bigravity
• Small-scale Tests of Inflation
• Non-linear dynamics of the minimal theory of massive gravity
• Tensor bispectrum mediated by an excited scalar field during inflation
• Higher-Dimensional Minimal Theory of Mass-Varying Massive Gravity And Its Cosmological Consequences