Journal
PHYSICS LETTERS B
Volume 759, Issue -, Pages 1-8Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2016.05.047
Keywords
Dark matter; Scalar field; Higgs field; Non-renormalizable operators; Extra dimensions
Funding
- Fundacao para a Ciencia e a Tecnologia (FCT) [PD/BI/106012/2014]
- FCT grant [SFRH/BPD/85969/2012]
- H2020-MSCA-RISE Grant [StronGrHEP-690904]
- CIDMA project [UID/MAT/04106/2013]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/85969/2012, PD/BI/106012/2014] Funding Source: FCT
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We discuss the possibility that dark matter corresponds to an oscillating scalar field coupled to the Higgs boson. We argue that the initial field amplitude should generically be of the order of the Hubble parameter during inflation, as a result of its quasi-de Sitter fluctuations. This implies that such a field may account for the present dark matter abundance for masses in the range 10(-6)-10(-4)e V, if the tensor-to-scalar ratio is within the range of planned CMB experiments. We show that such mass values can naturally be obtained through either Planck-suppressed non-renormalizable interactions with the Higgs boson or, alternatively, through renormalizable interactions within the Randall-Sundrum scenario, where the dark matter scalar resides in the bulk of the warped extra-dimension and the Higgs is confined to the infrared brane. (C) 2016 The Authors. Published by Elsevier B.V.
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