PAMELA through a Magnetic Lens

Abstract

The PAMELA satellite has observed an excess in the positron to electron ratio above theoretical predictions in the range 10 - 100 GeV that increases with energy. We propose that the excess is not due to a change in the local interstellar spectrum, but is due to heliospheric modulation. We motivate this from the known form of the heliospheric magnetic field and predict that the excess will disappear when we enter a period of solar maximum activity.

15 pages, 5 figures, updated to match published version

References in corpus (2)

• Observation of an anomalous positron abundance in the cosmic radiation
• MiXDM: Cosmic Ray Signals from Multiple States of Dark Matter

Cited by in corpus (3)

• Dark Sunshine: Detecting Dark Matter through Dark Photons from the Sun
• Constraints on dark matter models from a Fermi LAT search for high-energy cosmic-ray electrons from the Sun
• Quantum-phase-field concept of matter: Emergent gravity in the dynamic universe