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Inflationary Gravitational Leptogenesis

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arxiv 2205.01689 v1 pith:CRHZ64ZL submitted 2022-05-03 hep-ph astro-ph.CO

Inflationary Gravitational Leptogenesis

classification hep-ph astro-ph.CO
keywords asymmetrybaryongravitationalreheatingright-handedinflationarymodelneutrinos
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We consider the generation of the baryon asymmetry in models with right-handed neutrinos produced through gravitational scattering of the inflaton during reheating. The right-handed neutrinos later decay and generate a lepton asymmetry, which is partially converted to a baryon asymmetry by Standard Model sphaleron processes. We find that a sufficient asymmetry can be generated for a wide range of right-handed neutrino masses and reheating temperatures. We also show that the same type of gravitational scattering produces Standard Model Higgs bosons, which can achieve inflationary reheating consistent with the production of a baryon asymmetry.

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Cited by 4 Pith papers

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

  1. Leptogenesis and Low Reheating Temperatures

    hep-ph 2026-07 conditional novelty 7.0

    Standard non-thermal leptogenesis works at arbitrarily low reheating temperatures above the BBN bound when the inflaton potential has a quartic minimum (k≥4), because the inflaton's evolving mass kinematically shuts o...

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

    hep-ph 2026-05 unverdicted novelty 5.0

    Certain inflation models produce right-handed neutrinos via gravitational effects sufficient for leptogenesis to explain the baryon asymmetry, testable by inflationary gravitational waves.

  3. Induced Multi-phase Inflation with Reheating: Leptogenesis and Dark Matter Production in Metric versus Palatini

    hep-ph 2026-04 unverdicted novelty 4.0

    Multi-phase non-minimal inflation in metric and Palatini gravity predicts ns between 0.93 and 0.98, r up to 0.03 in metric but below 10^{-5} in Palatini, with non-thermal DM and leptogenesis viable for couplings in th...

  4. CMB signatures of gravity-mediated dark radiation in $\mathbf{\Delta N_{\rm eff}}$

    hep-ph 2026-04 unverdicted novelty 4.0

    Gravity-mediated production of scalar and vector dark radiation yields Planck 2018 constraints on reheating temperature T_RH and background equation of state w_Φ, with comparisons to right-handed neutrinos, ALPs, and ...