Dark matter through the axion portal

Journal Article · Wed Apr 01 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.075008· OSTI ID:21308199

Nomura, Yasunori; Thaler, Jesse ^[1]

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1. Berkeley Center for Theoretical Physics, University of California, Berkeley, California 94720 (United States) and Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

Motivated by the galactic positron excess seen by PAMELA and ATIC/PPB-BETS, we propose that dark matter is a TeV-scale particle that annihilates into a pseudoscalar 'axion'. The positron excess and the absence of an antiproton or gamma ray excess constrain the axion mass and branching ratios. In the simplest realization, the axion is associated with a Peccei-Quinn symmetry, in which case it has a mass around 360-800 MeV and decays into muons. We present a simple and predictive supersymmetric model implementing this scenario, where both the Higgsino and dark matter obtain masses from the same source of TeV-scale spontaneous symmetry breaking.

• OSTI ID: 21308199
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 7; Other Information: DOI: 10.1103/PhysRevD.79.075008; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIPROTONS
BRANCHING RATIO
GAMMA RADIATION
MASS
MEV RANGE 100-1000
MUONS
NONLUMINOUS MATTER
PARTICLE DECAY
SUPERSYMMETRY
SYMMETRY BREAKING
TEV RANGE