A dark U(1)_D model with dark Higgs inflation and low reheating allows dark photon dark matter to achieve the observed relic density for a wider range of couplings, with inflation predictions matching Planck, BICEP/Keck and ACT data.
McDonald, [arXiv:2505.07488 [hep-ph]]
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Unitarity-conserving Peccei-Quinn inflation agrees with ACT data within 1 sigma and allows axion decay constants up to 6.4e13 GeV without post-inflation symmetry restoration, unlike the conventional model.
A Palatini-inspired induced-gravity inflation model in supergravity fits ACT DR6 data while embedding into a B-L extended MSSM with split SUSY and leptogenesis.
citing papers explorer
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Low-reheating scenario in dark Higgs inflation and its impact on dark photon dark matter production
A dark U(1)_D model with dark Higgs inflation and low reheating allows dark photon dark matter to achieve the observed relic density for a wider range of couplings, with inflation predictions matching Planck, BICEP/Keck and ACT data.
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Conventional and Unitarity-Conserving Peccei-Quinn Inflation Models and ACT
Unitarity-conserving Peccei-Quinn inflation agrees with ACT data within 1 sigma and allows axion decay constants up to 6.4e13 GeV without post-inflation symmetry restoration, unlike the conventional model.
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Induced-Gravity Palatini-Like Higgs Inflation in Supergravity Confronts ACT DR6
A Palatini-inspired induced-gravity inflation model in supergravity fits ACT DR6 data while embedding into a B-L extended MSSM with split SUSY and leptogenesis.