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Reevaluation of the cosmic antideuteron flux from cosmic-ray interactions and from exotic sources

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arxiv 2201.00925 v2 pith:ZIFM4PHU submitted 2022-01-04 astro-ph.HE

Reevaluation of the cosmic antideuteron flux from cosmic-ray interactions and from exotic sources

classification astro-ph.HE
keywords antideuteroncosmic-rayexoticpropagationantideuteronsfluxfluxesgalaxy
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Cosmic-ray antideuterons could be a key for the discovery of exotic phenomena in our Galaxy, such as dark-matter annihilations or primordial black hole evaporation. Unfortunately the theoretical predictions of the antideuteron flux at Earth are plagued with uncertainties from the mechanism of antideuteron production and propagation in the Galaxy. We present the most up-to-date calculation of the antideuteron fluxes from cosmic-ray collisions with the interstellar medium and from exotic processes. We include for the first time the antideuteron inelastic interaction cross section recently measured by the ALICE collaboration to account for the loss of antideuterons during propagation. In order to bracket the uncertainty in the expected fluxes, we consider several state-of-the-art models of antideuteron production and of cosmic-ray propagation.

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Cited by 6 Pith papers

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