Reheating after the Higgs Inflation

Manda Malekpour; Kourosh Nozari

doi:10.1016/j.aop.2025.170244

paper

Reheating after the Higgs Inflation

arXiv:2608.23608 · doi:10.1016/j.aop.2025.170244

Abstract

Since the discovery of the Higgs particle in the LHC, numerous inflationary models utilize it as the inflaton. In this study, after establishing that Higgs inflation can be a viable model in the context of unimodular gravity, we address a scenario related to reheating, which plays a crucial role in connecting the inflationary era to a hot Big Bang universe. Also, we calculate essential parameters such as the temperature and the e-folds number according to the equation of the state parameter ( $ω_{r e}$ ) in this regime of reheating. The physics behind the reheating process are extremely imprecise at present, and we have only a very limited range of acceptable values for $ω_{r e}$ . We analyze the compatibility with Planck2018, BICEP/Keck2021, DESI2024, and ACT array bounds and find that within this model, $ω_{r e}$ is restricted to the range $- 1 \leq ω_{r e} \leq \frac{1}{6}$ .

13 pages, 4 figures, 1 table