Jul 26 – 30, 2010
Montpellier 2 University
Europe/Paris timezone

The Galactic electron and positron "excesses": astrophysical versus dark matter interpretations

Jul 26, 2010, 11:20 AM
25m
Amphithéatre Dumontet (Montpellier 2 University)

Amphithéatre Dumontet

Montpellier 2 University

Place Eugene Bataillon, 34095 Montpellier Cedex 5 FRANCE
Talk Dark Matter Indirect Searches Plenary session : Indirect Searches 1

Speaker

Dr Julien Lavalle (University of Torino)

Description

The observation by PAMELA of a rising positron fraction up to 100 GeV, further complemented with the ATIC / Fermi / HESS data on the electron+positron spectrum up to a few TeV, has led to significant adjustments in our understanding of the local high energy electron-positron budget. Many interpretation attempts have invoked dark matter annihilation or decay to fill the gap between the "standard" predictions and the apparent "excesses", while some more conventional explanations were proposed from studying the contributions of local pulsars and/or supernova remnants. In this talk, we will discuss the status of these different scenarios, and we will sketch a potential roadmap (i) to close the case of the positron "excess" (ii) for future improvements in our general understanding of cosmic ray electrons and positrons.

Primary author

Dr Julien Lavalle (University of Torino)

Presentation materials