DOE OSTI · 2997183
X-rays from inelastic dark matter freeze-in
Abstract
We study inelastic dark matter produced via freeze-in through a light mediator with a mass splitting below the electron-positron threshold. In this regime, the heavier dark matter state is naturally long-lived compared to the age of the Universe and decays to the lighter state in association with photons. Given a light mediator, the dark matter abundance is directly related to the decay rate of the heavier dark matter. We show that observations of photons from the Galactic Center can effectively probe inelastic dark matter freeze-in with mediators at the 100 MeV scale and dark matter at the GeV scale.
Keep this discovery
Explore connections, maps & timelines
Krnjaic, Gordan [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States). Fermilab Center for Particle Astrophysics; Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP)] (ORCID:0000000174209577), McKeen, David [TRIUMF, Vancouver, BC (Canada)] (ORCID:0000000222721170), Mizuta, Riku [TRIUMF; Univ. of British Columbia, Vancouver, BC (Canada)] (ORCID:0009000551245651), Mohlabeng, Gopolang [Simon Fraser Univ., Burnaby, BC (Canada); TRIUMF, Vancouver, BC (Canada)] (ORCID:0000000274822643), Morrissey, David E. [TRIUMF, Vancouver, BC (Canada)] (ORCID:0000000309365770), Tuckler, Douglas [TRIUMF, Vancouver, BC (Canada); Simon Fraser Univ., Burnaby, BC (Canada)] (ORCID:0000000256566551). 2025-12-24. X-rays from inelastic dark matter freeze-in. https://doi.org/10.1103/99z7-kz4s
Cite the original work for its findings. Save a collection to share your selection of sources.