Dark Matter: The Leptonic Connection

Abstract

Recent observatons 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 (nu eta^0 - l eta^+) chi and l^c zeta^- chi^c which allow this to happen, where chi and/or chi^c are fermionic dark-matter candidates. We point out in particular the importance of chi chi to l^+ l^- gamma to both positron and gamma-ray signals within this framework.

4 pages, 5 figures. v2: PLB version

References in corpus (3)

• Observing the Dark Scalar Doublet and its Impact on the Standard-Model Higgs Boson at Colliders
• Significant Gamma Lines from Inert Higgs Dark Matter
• Search for Dark Matter

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• Anomaly Induced Dark Matter Decay and PAMELA/ATIC Experiments
• Double Type-II Seesaw, Baryon Asymmetry and Dark Matter for Cosmic e^\pm Excesses
• Decaying neutralino dark matter in anomalous $U(1{)}_H$ models