Dark Matter Is Born from Ghostly Neutrinos express

Original: "Sterile Neutrino Dark Matter as a Probe of Inflationary Reheating"

arXiv:2601.03346v2 · 2026-01-06 · CC BY 4.0 · 1 min

Sterile neutrinos may have arisen in the first moments after the Big Bang and become dark matter.

Visible matter is a drop in the sea of cosmic soup. The foundation of the Universe is made of invisible dark matter, whose gravity keeps galaxies from flying apart. The best candidate for this role is sterile neutrinos, ghost particles connected to us only by the thinnest of bridges.

Immediately after the Big Bang, space suddenly expanded and became extremely hot. A new model shows: if a tiny fraction of that energy went into creating sterile neutrinos, exactly enough were born to explain all dark matter.

It's like a boiling pot: almost all the drops are ordinary particles, while the rare splashes became the invisible scaffolding of galaxies.

The mechanism solves the mystery of the weak signal from neutrinos, bypassing the limitations of telescopes. Now dark matter becomes a tool: future observatories will be able to measure the temperature of that 'cooking,' peering into the first moments after the Big Bang.

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Sterile neutrinos are so elusive that they could fly through a light-year of lead without ever colliding with an atom.

\frac{m_\phi}{T_{rh}}

ratio of inflaton mass to reheating temperature

Scientists

Fritz Zwicky Vera Rubin Adam Riess Saul Perlmutter Brian Schmidt Marie Curie

Concepts

sterile neutrino dark matter neutrino sources dark matter reheating dune antineutrino inflation aluminum nitride thermal radiation thermal camera neutron star deuteron neutron diffraction neutrinoless double beta decay nuclear recoil xmm newton stellar interior cold gas de sitter space liquid xenon

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Dark Matter Is Born from Ghostly Neutrinos express