Dark matter in natural supersymmetric extensions of the standard model

Journal Article · Sun Aug 15 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.043532· OSTI ID:21420937

Ferrer, Francesc; Spitzer, Christopher ^[1]

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1. Physics Department and McDonnell Center for the Space Sciences, Washington University, St Louis, Missouri 63130 (United States)

We explore the dark matter sector in extensions of the minimal supersymmetric standard model that can provide a good fit to the PAMELA cosmic-ray positron excess, while at the same time addressing the little-hierarchy problem of the minimal supersymmetric standard model. Adding a singlet Higgs superfield S can account for the observed positron excess, as recently discussed in the literature, but we point out that it requires a fine-tuned choice for the parameters of the model. We find that including an additional singlet {Psi} in a model with gauge-mediated supersymmetry breaking is a minimal extension which allows both a reduction of the weak-scale fine-tuning and an interpretation of the cosmic-ray observations in terms of dark matter annihilations in the galactic halo. Our setup contains a light axion but does not require light CP-even scalars in the spectrum.

• OSTI ID: 21420937
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 4 Vol. 82; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
COSMIC POSITRONS
COSMIC RADIATION
CP INVARIANCE
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HIGGS BOSONS
HIGGS MODEL
INTERACTIONS
INVARIANCE PRINCIPLES
IONIZING RADIATIONS
LEPTONS
MATHEMATICAL MODELS
MATTER
NONLUMINOUS MATTER
PARTICLE INTERACTIONS
PARTICLE MODELS
POSITRONS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
RADIATIONS
SECONDARY COSMIC RADIATION
SPECTRA
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY
SYMMETRY BREAKING
UNIFIED GAUGE MODELS