Sub-GeV Dark Matter Shining at Future MeV γ-Ray Telescopes

Physical Review Letters
Francesco D'Eramo, Stefano Profumo

Abstract

We propose a novel framework where light (sub-GeV) dark matter (DM) is detectable with future MeV γ-ray telescopes without conflicting with cosmic microwave background (CMB) data. The stable DM particle χ has a very low thermal relic abundance due to its large pair-annihilation cross section. The DM number density is stored in a slightly heavier, metastable partner ψ with suppressed pair-annihilation rates, that does not perturb the CMB, and whose late-time decays ψ→χ fill the Universe with χ DM particles. We provide explicit, model-independent realizations for this framework, and discuss constraints on late-time decays, and thus on parameters of this setup, from CMB, big bang nucleosynthesis, and large scale structure.

References

Mar 15, 1986·Physical Review. D·R J Scherrer, M S Turner
Nov 15, 1986·Physical Review. D·R J Scherrer, M S Turner
Nov 15, 1990·Physical Review. D·M Kamionkowski, M S Turner
May 15, 1991·Physical Review. D·K Griest, D Seckel
Feb 10, 1992·Physical Review Letters·D B Kaplan
Nov 8, 2014·Physical Review Letters·Yonit HochbergJay G Wacker
Aug 22, 2015·Physical Review Letters·Raffaele Tito D'Agnolo, Joshua T Ruderman
Dec 3, 2016·Physical Review Letters·Jeff Asaf DrorWee Hao Ng
Sep 28, 2017·Physical Review Letters·Raffaele Tito D'AgnoloJoshua T Ruderman

❮ Previous
Next ❯

Citations

May 31, 2019·Physical Review Letters·Stefania GoriBibhushan Shakya

❮ Previous
Next ❯

Related Concepts

Related Feeds

Brucellosis

Brucellosis is a bacterial infection caused by members of the genus brucella and remains one of the world's major zoonotic diseases. Discover the latest research on Brucellosis here.

Brucellosis (ASM)

Brucellosis is a bacterial infection caused by members of the genus brucella and remains one of the world's major zoonotic diseases. Discover the latest research on Brucellosis here.

Related Papers

Physical Review Letters
Raffaele Tito D'Agnolo, Joshua T Ruderman
Physical Review Letters
Jonathan L FengFumihiro Takayama
© 2022 Meta ULC. All rights reserved