Antiproton limits on decaying gravitino dark matter

2013/05/31 by Timur Delahaye, Michael Grefe · 2 citations
Physics and Astronomy · #Antiproton #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Gravitino #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #R-parity #Supergravity #Supersymmetry #astro-ph.CO #astro-ph.HE #hep-ph

paper · pdf · doi:10.1088/1475-7516/2013/12/045

published as JCAP12(2013)045 · 46 pages, 23 pdf figures; addition of two plots, extended discussion, no change of results or conclusions, matches published version

openalex publication_date 2013/12/20 · arxiv created 2014/01/07 · arxiv updated 2014/01/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We derive 95 % CL lower limits on the lifetime of decaying dark matter in the channels Z ν, W ℓ and h ν using measurements of the cosmic-ray antiproton flux by the PAMELA experiment. Performing a scan over the allowed range of cosmic-ray propagation parameters we find lifetime limits in the range of 8 × 10 28 s to 5 × 10 25 s for dark matter masses from roughly 100 GeV to 10 TeV. We apply these limits to the well-motivated case of gravitino dark matter in scenarios with bilinear violation of R -parity and find a similar range of lifetime limits for the same range of gravitino masses. Converting the lifetime limits to constraints on the size of the R -parity violating coupling we find upper limits in the range of 10 −8 to 8 × 10 −13 .

Citations

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Cited by

• Review of the theoretical and experimental status of dark matter identification with cosmic-ray antideuterons
• Constraints on particle dark matter from cosmic-ray antiprotons