Gravitino/axino as decaying dark matter and cosmological tensions

Koichi Hamaguchi, Kazunori Nakayama, Yong Tang

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


In supersymmetric axion models, if the gravitino or axino is the lightest SUSY particle (LSP), the other is often the next-to-LSP (NLSP). We investigate the cosmology of such a scenario and point out that the lifetime of the NLSP naturally becomes comparable to the present age of the universe in a viable parameter region. This is a well-motivated example of the so-called decaying dark matter model, which is recently considered as an extension of the ΛCDM model to relax some cosmological tensions.

Original languageEnglish
Pages (from-to)415-419
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 2017 Sept 10
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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