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Gravitational Waves from Particle Decays during Reheating

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arxiv 2310.12023 v2 pith:X77VVSLL submitted 2023-10-18 hep-ph astro-ph.COgr-qc

Gravitational Waves from Particle Decays during Reheating

classification hep-ph astro-ph.COgr-qc
keywords gravitationalwavesdecayduringreheatingastrophysicalattentionattracting
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Gravitational waves have become an irreplaceable tool for exploring the post-inflationary universe. Their cosmological and astrophysical origins have been attracting numerous attention. In this Letter, we point out a novel source of ultra-high frequency gravitational waves: the decay of particles produced during the reheating era. We highlight the decay of the Higgs boson as a representative case, showing how it yields a testable gravitational wave spectrum by future observations.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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    Even in the weak-backreaction regime, axion inflation produces high-frequency primordial gravitational waves many orders of magnitude above the vacuum spectrum, peaking around MHz–GHz.

  2. A Unified Bogoliubov Approach to Primordial Gravitational Waves: From Inflation to Reheating

    hep-ph 2026-04 unverdicted novelty 6.0

    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.

  3. Constraints on High-Frequency Gravitational Waves from Graviton-Photon Conversion in the M87 Galaxy

    hep-ph 2026-04 conditional novelty 6.0

    Graviton–photon conversion in M87's magnetic field sets h_c and Ωgw h² limits 1–5 orders of magnitude tighter than Milky Way-based bounds across 10^10–10^27 Hz.

  4. Irreducible Graviton Floor from Reheating

    hep-ph 2026-05 unverdicted novelty 5.0

    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.

  5. Probing Bose-enhanced Inflaton Decay with Gravitational Waves

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    Bose enhancement from a transient condensate of inflaton decay products dramatically increases decay efficiency and amplifies stochastic gravitational wave production to potentially observable levels.