Cosmic Ray Anomalies and Dark Matter Annihilation to Muons via a Higgs Portal Hidden Sector

Kohri, Kazunori and McDonald, John and Sahu, Narendra (2010) Cosmic Ray Anomalies and Dark Matter Annihilation to Muons via a Higgs Portal Hidden Sector. Physical Review D – Particles and Fields, 81 (2). ISSN 1550-2368

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Abstract

Annihilating dark matter (DM) models based on a scalar hidden sector with Higgs portal-like couplings to the Standard Model are considered as a possible explanation for recently observed cosmic ray excesses. Two versions of the model are studied, one with non-thermal DM as the origin of the boost factor and one with Sommerfeld enhancement. In the case of non-thermal DM, four hidden sector scalars which transform under a U(1)_{X} symmetry are added. The heaviest scalars decouple and later decay to DM scalars, so providing the boost factor necessary to explain the present DM annihilation rate. The mass of the annihilating scalars is limited to

Item Type: Journal Article
Journal or Publication Title: Physical Review D – Particles and Fields
Additional Information: 24 pages, 4 figures. Expanded discussion, conclusions unchanged. Version to be published in Physical Review D
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 56805
Deposited By: ep_importer_pure
Deposited On: 15 Aug 2012 11:57
Refereed?: Yes
Published?: Published
Last Modified: 22 Jan 2020 01:58
URI: https://eprints.lancs.ac.uk/id/eprint/56805

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