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arXiv · 2605.05304

Nonthermal leptogenesis via cosmological gravitational particle production is tested by inflationary gravitational waves

Tammi Chowdhury·Leah Jenks·Edward W. Kolb·Andrew J. Long·Evan McDonough
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Abstract

We explore the coincidence of scales between cosmic inflation and right-handed neutrinos in seesaw models. We show that inflation models, which will be tested by next-generation CMB experiments, can produce right-handed neutrinos in sufficient abundance to explain the observed baryon asymmetry of the universe. The model can be tested by gravitational wave signatures from cosmic inflation and particle production.

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Tammi Chowdhury, Leah Jenks, Edward W. Kolb, Andrew J. Long, Evan McDonough. 2026-05-06. Nonthermal leptogenesis via cosmological gravitational particle production is tested by inflationary gravitational waves. https://arxiv.org/abs/2605.05304

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