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most citedGauge coupling jump and small instantons from a large non-minimal coupling

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hep-ph2025

Gravitational Decays of Secluded Scalars and Graviton Dark Radiation

Kazunori Nakayama, Fuminobu Takahashi, Juntaro Wada

We discuss graviton dark radiation produced by the decay of a secluded scalar field that couples to the Standard Model (SM) only through gravity. Such scalar fields are long-lived,…