The anomaly in the cosmic-ray positron spectrum

2007/10/12 by C. H. Chung, Chung, C. H., H. Gast +5 · 1 citation
Physics and Astronomy · #Astrophysics (astro-ph) #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Particle Detector Development and Performance #astro-ph

paper · pdf · doi:10.48550/arxiv.0710.2428

Submitted for the SUSY07 proceedings, 4 pages, PDFLaTeX, 4 pdf figures

arxiv created 2007/10/12 · openalex publication_date 2007/10/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A recent analysis of cosmic-ray data from a space borne experiment by the AMS collaboration supports the observation of an excess in the cosmic-ray positron spectrum by previous balloon experiments. The combination of the various experimental data establishes a deviation from the expected background with a significance of more than four standard deviations. The observed change in the spectral index cannot be explained without introducing a new source of positrons. When interpreted within the MSSM a consistent description of the antiproton spectrum, the diffuse gamma-ray flux and the positron fraction is obtained which is compatible with all other experimental data, including recent WMAP data.

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• Indirect Dark Matter Signals

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