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16 August 2022
  » arxiv » 1701.7747

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Dipolar Dark Matter as an Effective Field Theory
Luc Blanchet ; Lavinia Heisenberg ;
Date 26 Jan 2017
AbstractDipolar Dark Matter (DDM) is an alternative model motivated by the challenges faced by the standard cold dark matter model to describe the right phenomenology at galactic scales. A promising realisation of DDM was recently proposed in the context of massive bigravity theory. The model contains dark matter particles, as well as a vector field coupled to the effective composite metric of bigravity. This model is completely safe in the gravitational sector thanks to the underlying properties of massive bigravity. In this work we investigate the exact decoupling limit of the theory, including the contribution of the matter sector, and prove that it is free of ghosts in this limit. We conclude that the theory is acceptable as an Effective Field Theory below the strong coupling scale.
Source arXiv, 1701.7747
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