The PAMELA positron excess from annihilations into a light boson
Journal Article
·
· Journal of Cosmology and Astroparticle Physics
- Center for Cosmology and Particle Physics, Department of Physics, New York University, New York, NY 10003 (United States)
Recently published results from the PAMELA experiment have shown conclusive evidence for an excess of positrons at high ( ∼ 10–100 GeV) energies, confirming earlier indications from HEAT and AMS-01. Such a signal is generally expected from dark matter annihilations. However, the hard positron spectrum and large amplitude are difficult to achieve in most conventional WIMP models. The absence of any associated excess in anti-protons is highly constraining on models with hadronic annihilation modes. We revisit an earlier proposal, wherein the dark matter annihilates into a new light (∼
- OSTI ID:
- 22273116
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 12 Vol. 2009; ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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