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astro-ph.CO2026
PBH runaway during reheating
Md Riajul Haque, Mathieu Gross, Mathieu Houlier +1
The growth of primordial black holes through the absorption of the surrounding plasma has recently been shown to exhibit a critical behavior during radiation domination. We extend…
hep-ph2026
Gravitational ultra-relativistic freeze-out during general reheating
Mathieu Gross, Stephen E. Henrich, Fotis Koutroulis
We investigate ultrarelativistic freeze-out (UFO) in the context of generic reheating scenarios. While the standard WIMP dark matter paradigm has been extensively studied, UFO has…
hep-ph2026
When direct detection constrains reheating temperature: freeze-in with stronger couplings and inflaton-seeded freeze-in
Xavier Bertou, Olivier Deligny, Mathieu Gross +2
Recent results from the DAMIC-M and PandaX collaborations have excluded the standard freeze-in production of dark matter for masses in the range $3~\mathrm{MeV} \lesssim m_χ\lesssi…