Heavy spin-2 Dark Matter

Abstract

We provide further details on a recent proposal addressing the nature of the dark sectors in cosmology and demonstrate that all current observations related to Dark Matter can be explained by the presence of a heavy spin-2 particle. Massive spin-2 fields and their gravitational interactions are uniquely described by ghost-free bimetric theory, which is a minimal and natural extension of General Relativity. In this setup, the largeness of the physical Planck mass is naturally related to extremely weak couplings of the heavy spin-2 field to baryonic matter and therefore explains the absence of signals in experiments dedicated to Dark Matter searches. It also ensures the phenomenological viability of our model as we confirm by comparing it with cosmological and local tests of gravity. At the same time, the spin-2 field possesses standard gravitational interactions and it decays universally into all Standard Model fields but not into massless gravitons. Matching the measured DM abundance together with the requirement of stability constrains the spin-2 mass to be in the 1 to 100 TeV range.

Latex, 46 pages, 4 figures. Matches published version

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Cited by in corpus (8)

• Strong constraints on cosmological gravity from GW170817 and GRB 170817A
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Oscillating Spin-2 Dark Matter
• Modified Gravity Explains Dark Matter?
• Self-interacting Spin-2 Dark Matter
• Massive graviton dark matter with environment dependent mass: A natural explanation of the dark matter-baryon ratio
• Constraints on hidden gravitons from fifth-force experiments and stellar energy loss
• Massive gravitons in arbitrary spacetimes