Journal of High Energy Physics

, 2019:20 | Cite as

ν-inflaton dark matter

  • António Torres MansoEmail author
  • João G. Rosa
Open Access
Regular Article - Theoretical Physics


We present a unified model where the same scalar field can drive inflation and account for the present dark matter abundance. This scenario is based on the incomplete decay of the inflaton field into right-handed neutrino pairs, which is accomplished by imposing a discrete interchange symmetry on the inflaton and on two of the right-handed neutrinos. We show that this can lead to a successful reheating of the Universe after inflation, while leaving a stable inflaton remnant at late times. This remnant may be in the form of WIMP-like inflaton particles or of an oscillating inflaton condensate, depending on whether or not the latter evaporates and reaches thermal equilibrium with the cosmic plasma. We further show that this scenario is compatible with generating light neutrino masses and mixings through the seesaw mechanism, predicting at least one massless neutrino, and also the observed baryon asymmetry via thermal leptogenesis.


Beyond Standard Model Cosmology of Theories beyond the SM CP violation Neutrino Physics 


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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Copyright information

© The Author(s) 2019

Authors and Affiliations

  1. 1.Departamento de Física e Astronomia, Faculdade de Ciências da Universidade do PortoPortoPortugal
  2. 2.Departamento de Física da Universidade de Aveiro and CIDMAAveiroPortugal

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