21-23 January 2015
Europe/Zurich timezone

What can we learn from a sharply faling positron fraction?

Speaker

Timur Delahaye (Oskar Klein Centre)

Description

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)

Co-authors

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

Presentation Materials

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