3 papers
hep-ph2025
Phenomenological Constraints on Higgs reheating
Yann Cado, Mathieu Gross, Yann Mambrini +1
In many models of inflation, reheating is realized through a coupling between the inflaton and the Higgs boson. Often, the mass of the inflaton is of order GeV determined…
hep-ph2025
Ultra-Relativistic Freeze-Out During Reheating
Stephen E. Henrich, Mathieu Gross, Yann Mambrini +1
We perform a thorough investigation of (ultra)relativistic freeze-out (UFO) during reheating. While the standard WIMP (non-relativistic freeze-out) and FIMP (freeze-in) paradigms h…
hep-ph2024
Kaluza-Klein Graviton Freeze-In and Big Bang Nucleosynthesis
Mathieu Gross, Dan Hooper
In models featuring extra spatial dimensions, particle collisions in the early universe can produce Kaluza-Klein gravitons. Such particles will later decay, potentially impacting t…