PAMELA positron excess as a signal from the hidden sector

Journal Article · Sun Mar 15 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.063509· OSTI ID:21260144

Feldman, Daniel; Nath, Pran ^[1]; Zuowei, Liu ^[2]

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1. Department of Physics, Northeastern University, Boston, Massachusetts 02115 (United States)
2. C. N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, New York 11794 (United States)

The recent positron excess observed in the PAMELA satellite experiment strengthens previous experimental findings. We give here an analysis of this excess in the framework of the Stueckelberg extension of the standard model which includes an extra U(1){sub X} gauge field and matter in the hidden sector. Such matter can produce the right amount of dark matter consistent with the Wilkinson Microwave Anisotropy Probe (WMAP) constraints. Assuming the hidden sector matter to be Dirac fermions it is shown that their annihilation can produce the positron excess with the right positron energy dependence seen in the HEAT, AMS, and the PAMELA experiments. The predictions of the p/p flux ratio also fit the data.

• OSTI ID: 21260144
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 6 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
ANNIHILATION
COSMIC POSITRONS
DIRAC COSMOLOGY
ENERGY DEPENDENCE
FERMIONS
FIELD THEORIES
FORECASTING
GAUGE INVARIANCE
MICROWAVE RADIATION
NONLUMINOUS MATTER
POSITRON DETECTION
SATELLITES
STANDARD MODEL
U-1 GROUPS