A T-model inflation with a step-like Gauss-Bonnet coupling can produce a double-peaked power spectrum, nanohertz gravitational waves matching PTA data, and primordial black holes that may form part of the dark matter.
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Gravitational waves and primordial black holes from the T-model inflation with Gauss-Bonnet correction
A T-model inflation with a step-like Gauss-Bonnet coupling can produce a double-peaked power spectrum, nanohertz gravitational waves matching PTA data, and primordial black holes that may form part of the dark matter.