Dark matter: The leptonic connection

Recent observations of high-energy positrons and electrons by the PAMELA and ATIC experiments may be an indication of the annihilation of dark matter into leptons and not quarks. This leptonic connection was foreseen already some years ago in two different models of radiative neutrino mass. We discu...

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Bibliographic Details
Published in:Physics letters. B 2009-03, Vol.673 (2), p.152-155
Main Authors: Cao, Qing-Hong, Ma, Ernest, Shaughnessy, Gabe
Format: Article
Language:English
Subjects:
ANNIHILATION
ELECTRONS
Exact sciences and technology
LEPTONS
NEUTRINOS
NONLUMINOUS MATTER
Nuclear physics
NUCLEAR PHYSICS AND RADIATION PHYSICS
Physics
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
POSITRONS
QUARKS
The physics of elementary particles and fields
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Summary:Recent observations of high-energy positrons and electrons by the PAMELA and ATIC experiments may be an indication of the annihilation of dark matter into leptons and not quarks. This leptonic connection was foreseen already some years ago in two different models of radiative neutrino mass. We discuss here the generic interactions (νη0−lη+)χ and lcζ−χc which allow this to happen, where χ and/or χc are fermionic dark-matter candidates. We point out in particular the importance of χχ→l+l−γ to both positron and gamma-ray signals within this framework.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2009.02.015