An EFT with inflaton-dependent axion kinetic term organizes direct decay and annihilation production during reheating, yielding ΔN_eff contributions that scale as T_rh^{-2} and T_rh^{4/3} respectively and allowing a two-dimensional map of constraints on Wilson coefficients and reheating temperature.
Stochastic Gravitational Waves from Particle Origin,
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An improved Bogoliubov numerical method computes the full primordial GW spectrum from inflation to reheating and shows that inflaton anharmonicity imprints distinctive features at high frequencies.
Perturbative inflaton decay emits an irreducible stochastic GW background with Ω_GW ∝ f spectrum whose amplitude is set by the hard decay rate and reaches O(10^{-17}) at GHz scales.
Bose enhancement from a transient condensate of inflaton decay products dramatically increases decay efficiency and amplifies stochastic gravitational wave production to potentially observable levels.
High-frequency primordial gravitational waves extend to higher frequencies due to post-inflation inflaton dynamics, and their detailed spectrum shape can distinguish inflation models.
Scalar leptoquarks in SU(5) GUT produce a stochastic gravitational wave background via graviton bremsstrahlung whose spectrum may be accessible to resonant-cavity detectors.
citing papers explorer
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An EFT Map of Axion Dark Radiation from Reheating
An EFT with inflaton-dependent axion kinetic term organizes direct decay and annihilation production during reheating, yielding ΔN_eff contributions that scale as T_rh^{-2} and T_rh^{4/3} respectively and allowing a two-dimensional map of constraints on Wilson coefficients and reheating temperature.
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A Unified Bogoliubov Approach to Primordial Gravitational Waves: From Inflation to Reheating
An improved Bogoliubov numerical method computes the full primordial GW spectrum from inflation to reheating and shows that inflaton anharmonicity imprints distinctive features at high frequencies.
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Irreducible Graviton Floor from Reheating
Perturbative inflaton decay emits an irreducible stochastic GW background with Ω_GW ∝ f spectrum whose amplitude is set by the hard decay rate and reaches O(10^{-17}) at GHz scales.
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Probing Bose-enhanced Inflaton Decay with Gravitational Waves
Bose enhancement from a transient condensate of inflaton decay products dramatically increases decay efficiency and amplifies stochastic gravitational wave production to potentially observable levels.
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High Frequency Spectrum of Primordial Gravitational Waves
High-frequency primordial gravitational waves extend to higher frequencies due to post-inflation inflaton dynamics, and their detailed spectrum shape can distinguish inflation models.
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Gravitational waves from graviton bremsstrahlung in scalar leptoquark decays
Scalar leptoquarks in SU(5) GUT produce a stochastic gravitational wave background via graviton bremsstrahlung whose spectrum may be accessible to resonant-cavity detectors.
- Irreducible Gravitational Wave Background as a Particle Detector