Gravitational leptogenesis from metric perturbations
| Autor: | Antonio L. Maroto, Alfredo D. Miravet |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics (astro-ph.CO) High Energy Physics - Phenomenology (hep-ph) FOS: Physical sciences Física Astrophysics::Cosmology and Extragalactic Astrophysics General Relativity and Quantum Cosmology (gr-qc) Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | In this work we make the observation that the gravitational leptogenesis mechanism can be implemented without invoking new axial couplings in the inflaton sector. We show that in the perturbed Robertson-Walker background emerging after inflation, the spacetime metric itself breaks parity symmetry and generates a non-vansihing Pontryagin density which can produce a matter-antimatter asymmetry. We analyze the inflationary and reheating scenarios in which the produced asymmetry could be compatible with observations. 5 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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