Inflaxion dark matter

  • Takeshi Kobayashi
  • Lorenzo UbaldiEmail author
Open Access
Regular Article - Theoretical Physics


A new mechanism for producing axion dark matter is proposed. By invoking low-scale inflation and a kinetic mixing between the axion and the inflaton, it is shown that the axion is driven to a field point slightly displaced from the potential minimum, which can give rise to the observed dark matter abundance. In this framework, different combinations of the axion and inflaton fields play various cosmological roles, including generating the cosmological perturbations, reheating the universe, and serving as dark matter. The kinetic mixing also relates the dark matter lifetime with the reheating temperature. The mechanism tames axions that would otherwise overdominate the universe, and thus opens up new windows in the axion parameter space, including decay constants at the GUT scale and higher.


Cosmology of Theories beyond the SM Effective Field Theories 


Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited


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© The Author(s) 2019

Authors and Affiliations

  1. 1.International Centre for Theoretical PhysicsTriesteItaly
  2. 2.SISSA and INFN Sezione di TriesteTriesteItaly
  3. 3.Institute for Fundamental Physics of the UniverseTriesteItaly

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