Expectations of the Cosmic Antideuteron Flux

Understand

The cosmic antideuteron is a promising probe for the dark matter annihilation signature.

• In order to determine the DM signature, the background astrophysical antideuteron flux should be carefully studied.
• In this work we provide a new calculation of the secondary antideuteron flux, and pay special attention to the uncertainties from hadronic interaction models by using several Monte Carlo generators.
• The uncertainties from propagation effects are also carefully investigated for both the astrophysical background and DM annihilation signature in several scenarios, which are constrained by the latest B/C ratio measured by AMS-02.