The Cosmic-Ray Positron and Electron Excess: An Experimentalist's Point of View

Details The Cosmic-Ray Positron and Electron Excess: An Experimentalist's Point of View The Cosmic-Ray Positron and Electron Excess: An Experimentalist's Point of View

2009-05-04

arxiv.org/abs/0905.0444v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 3 figures, to be published in the proceedings of "44th Rencontres de Moriond", La Thuile (Val d'Aosta, Italy) "Very H

Scientific paper

The recent report by the PAMELA team of the observed rise in the cosmic-ray positron fraction above a few GeV and the report of an excess of cosmic-ray electrons around a few hundred GeV by the ATIC collaboration has resulted in a flurry of publications interpreting these observations either as a possible signature from the decay of dark matter or as a contribution from isolated astrophysical sources. While those interpretations are scientifically exciting, the possibility that measurements are contaminated by misidentified cosmic ray protons can not be ignored.

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