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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 543001.0, MPI für Physik / MPI für Physik
Cosmological bounds on sub-MeV mass axions
Authors:Cadamuro, Davide; Hannestad, Steen; Raffelt, Georg; Redondo, Javier
Date of Publication (YYYY-MM-DD):2011
Title of Journal:Journal of Cosmology and Astroparticle Physics
Journal Abbrev.:JCAP
Issue / Number:02
Start Page:003
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Axions with mass greater than 0.7 eV are excluded by cosmological precision data because they provide too much hot dark matter. While for masses above 20 eV the axion lifetime drops below the age of the universe, we show that the cosmological exclusion range can be extended from 0.7 eV till 300 keV, primarily by the cosmic deuterium abundance: axion decays would strongly modify the baryon-to-photon ratio at BBN relative to the one at CMB decoupling. Additional arguments include neutrino dilution relative to photons by axion decays and spectral CMB distortions. Our new cosmological constraints complement stellar-evolution limits.
Classification / Thesaurus:Astroparticle Physics
Comment of the Author/Creator:19 pages, 10 figures
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2010-148
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/arxiv:1011.3694
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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