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Moduli Dark Matter and the Search for Its Decay Line using Suzaku X-Ray TelescopeLight scalar fields called moduli arise from a variety of different models involving supersymmetry and/or string theory; thus their existence is a generic prediction of leading theories for physics beyond the standard model. They also present a formidable, long-standing problem for cosmology. We argue that an anthropic solution to the moduli problem exists in the case of small moduli masses and that it automatically leads to dark matter in the form of moduli. The recent discovery of the 125 GeV Higgs boson implies a lower bound on the moduli mass of about a keV. This form of dark matter is consistent with the observed properties of structure formation, and it is amenable to detection with the help of x-ray telescopes. We present the results of a search for such dark matter particles using spectra extracted from the first deep x-ray observations of the Draco and Ursa Minor dwarf spheroidal galaxies, which are darkmatter- dominated systems with extreme mass-to-light ratios and low intrinsic backgrounds. No emission line is positively detected, and we set new constraints on the relevant new physics.
Document ID
20130014486
Document Type
Reprint (Version printed in journal)
Authors
Kusenko, Alexander (California Univ. Los Angeles, CA, United States)
Loewenstein, Michael (Maryland Univ. College Park, MD, United States)
Yanagida, Tsutomu T. (Tokyo Univ. Chiba, Japan)
Date Acquired
August 27, 2013
Publication Date
April 9, 2013
Publication Information
Publication: Physical Review D
Volume: 87
Subject Category
Astronomy
Report/Patent Number
GSFC-E-DAA-TN8640
Funding Number(s)
CONTRACT_GRANT: NNG06EO9A
CONTRACT_GRANT: NSF PHY-1066293
CONTRACT_GRANT: DE-FG03-91ER40662
CONTRACT_GRANT: NNX11AD36G
CONTRACT_GRANT: NNX11AD11G
Distribution Limits
Public
Copyright
Public Use Permitted.

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