21-23 January 2015
Europe/Zurich timezone

What can we learn from a sharply faling positron fraction?


Timur Delahaye (Oskar Klein Centre)


Recent results from the AMS-02 data have confirmed that the cosmic ray positron fraction increases with energy between 10 and 200GeV. This quantity should not exceed 50%, and it is hence expected that it will either converge towards 50% or fall. We study the possibility that future data may show the positron fraction dropping down abruptly to the level expected with only secondary production, and forecast the implications of such a feature in term of possible injection mechanisms that include both dark matter and pulsars.

Primary author

Timur Delahaye (Oskar Klein Centre)


Kumiko Kotera (Institut d'Astrophysique de Paris) joseph silk (IAP)

Presentation Materials

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