EDE models increase inferred α_s from CMB data, strengthening tension with USR PBH models that predict negative running.
Yi, JCAP03, 048 (2023), arXiv:2206.01039 [gr-qc]
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Running into tension: primordial black holes from ultra-slow-roll inflation, spectral running, and the Hubble tension
EDE models increase inferred α_s from CMB data, strengthening tension with USR PBH models that predict negative running.