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Model independent interpretation of recent CR lepton data after AMS-02

By Daniele Gaggero and Luca Maccione

Abstract

We model the CR leptonic fluxes above 20 GeV in terms of a superposition of a standard and a charge symmetric extra component, which we generically describe as power-laws in momentum. We investigate under these hypotheses the compatibility between AMS-02, Fermi-LAT and PAMELA datasets on positron fraction, electron+positron spectrum and electron spectrum respectively. We find that it is possible to reconcile AMS and Fermi-LAT data within uncertainties, if energy-dependent effects are present in Fermi-LAT systematics. We also study possible deviations from charge symmetry in the extra component and find no compelling evidence for them.Comment: v1: 15 pages, 8 figures. v2: 18 pages, 10 figures. Improved discussion on Fermi-LAT systematic errors. Conclusions unchanged. Accepted by JCA

Topics: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology
Publisher: 'IOP Publishing'
Year: 2013
DOI identifier: 10.1088/1475-7516/2013/12/011
OAI identifier: oai:arXiv.org:1307.0271

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