Asymmetric Warm Dark Matter: From Cosmological Asymmetry to Chirality of Life

By Keith Cowing
Status Report
May 17, 2024
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Asymmetric Warm Dark Matter: From Cosmological Asymmetry to Chirality of Life
The parameter region of the AWDM. The correct baryon asymmetry can be obtained in the blue band. The region favored by the homochirality of the amino acids is represented by the red band. Here we use ξB = 0.1 − 10 while ξAA = 0.01 − 100. The gray (light gray) region is excluded by the observation relevant to the X-ray emission adopted from [39] (phase-space bound). The dotted line denotes the future reach by Athena [69]. — hep-ph

We investigate a novel scenario involving asymmetric keV-range dark matter (DM) in the form of right-handed (sterile) neutrinos.

Based on the Fermi-Dirac distribution, we demonstrate that asymmetric fermionic DM forms a Fermi degenerate gas, making it potentially colder than symmetric fermionic DM.

This setup simultaneously accounts for the Universe’s baryon asymmetry through tiny Yukawa interactions with Standard Model leptons and the Higgs field, and the homochirality of amino acids via decay into circularly polarized photons.

This scenario can be investigated through soft X-ray searches conducted by current and upcoming space missions. The helical X-rays is a smoking-gun signal of our scenario.

Additionally, we propose a new mechanism to suppress DM thermal production by introducing a light modulus, which may also benefit cosmology involving generic right-handed neutrinos with large mixing.

Wen Yin, Shota Nakagawa, Tamaki Murokoshi, Makoto Hattori

Comments: 22pages, 3figures, comments are welcome
Subjects: High Energy Physics – Phenomenology (hep-ph); Cosmology and Nongalactic Astrophysics (astro-ph.CO); Astrophysics of Galaxies (astro-ph.GA); Instrumentation and Methods for Astrophysics (astro-ph.IM); Biological Physics (
Cite as: arXiv:2405.10303 [hep-ph] (or arXiv:2405.10303v1 [hep-ph] for this version)
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Submission history
From: Wen Yin
[v1] Thu, 16 May 2024 17:56:16 UTC (1,137 KB)

Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp veteran, (he/him) 🖖🏻