descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 26 Feb 2014Embargo end date: 01 Jan 2013Publisher:IOP PublishingJournal:Journal of Cosmology and Astroparticle Physics, volume 2,014, pages 46-46 (eissn: 1475-7516,

Authors: Fuminobu Takahashi; Fuminobu Takahashi; Kwang Sik Jeong; Masahiro Kawasaki;

doi: 10.1088/1475-7516/2014/02/046 , 10.48550/arxiv.1310.1774

arXiv: http://arxiv.org/abs/1310.1774

Axions as hot and cold dark matter

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Abstract

The presence of a hot dark matter component has been hinted at 3 sigma by a combination of the results from different cosmological observations. We examine a possibility that pseudo Nambu-Goldstone bosons account for both hot and cold dark matter components. We show that the QCD axions can do the job for the axion decay constant f_a < O(10^10) GeV, if they are produced by the saxion decay and the domain wall annihilation. We also investigate the cases of thermal QCD axions, pseudo Nambu-Goldstone bosons coupled to the standard model sector through the Higgs portal, and axions produced by modulus decay.

24 pages, 1 figure

Related Organizations

Deutsches Elektronen-Synchrotron DESY
Germany
Tohoku University
Japan
Kavli IPMU
Institute for Cosmic Ray Research
Japan
University of Tokyo
Japan

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Keywords

High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, info:eu-repo/classification/ddc/530, Astrophysics - Cosmology and Nongalactic Astrophysics

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