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Probing Leptogenesis through Gravitational Waves
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We propose that a gravitational wave can be generated during leptogenesis in the early Universe which occurs when a heavy right handed neutrino decays out of equilibrium. Such a gravitational wave, as remnant of leptogenesis, is shown to be associated with distinguishing signatures that act as a powerful probe to leptogenesis and its requirements, which otherwise remains difficult to validate despite its success in explaining the baryon asymmetry of the Universe bearing connection to neutrino physics.
Forward citations
Cited by 3 Pith papers
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Particle productions during collisions of highly boosted bubble walls
Bubble-wall collisions produce ultra-heavy particles with a universal spectrum ∝ [V'(2vφ)]²/χ⁴, localized at the collision instant.
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Leptogenesis with sub-electroweak-scale reheating temperature
Leptogenesis remains viable for reheating temperatures below sphaleron freeze-out in three perturbative monomial-inflaton scenarios, with blue-tilted primordial GWs as a potential probe.
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Gravitational Wave Spectrum from the Production of Dark Matter via the freeze-in Mechanism
Graviton bremsstrahlung during freeze-in dark matter production yields a high-frequency gravitational wave background peaking near 5.35 x 10^10 Hz, with UV freeze-in amplitudes up to Omega_GW h^2 ~ 1e-17.
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