Reheating and Leptogenesis after Vector inflation

Abstract

We study the reheating and non-thermal leptogenesis in the case of a vector inflaton. We concentrate on particle production during the phase of oscillating background, especially gravitational production induced by the presence of non-minimal coupling imposed by an isotropic and homogeneous Universe. Including processes involving the exchange of graviton, we then extend our study to decay into fermions via direct or anomalous couplings. The necessity of non-minimal gravitational coupling and the gauge nature of couplings to fermions implies a much richer phenomenology than for a scalar inflaton.

29 pages, 4 figures, 15 tikzpicture Feynman diagrams, 2 tables. v3: Matches version published in JCAP. Modifications in section 4.2 on non-thermal leptogenesis, corrected figures, added comments in section 3.3 on radiative corrections and UV completion

References in corpus (26)

• Leptogenesis
• Vector Inflation
• Instability of anisotropic cosmological solutions supported by vector fields
• Kinetic Mixing as the Origin of Light Dark Scales
• Anomalies, Anomalous U(1)'s and generalized Chern-Simons terms
• Inflaton Oscillations and Post-Inflationary Reheating
• Instability of the ACW model, and problems with massive vectors during inflation
• Probing Physics Beyond the Standard Model: Limits from BBN and the CMB Independently and Combined
• Graviton Physics
• Gravitational portals in the early Universe
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• Minimal Anomalous U(1)' Extension of the MSSM
• Gravitational Portals with Non-Minimal Couplings
• Gravitational reheating
• Gravity as a Portal to Reheating, Leptogenesis and Dark Matter
• Effects of reheating on leptogenesis
• Gravitational waves in vector inflation
• Inflaton phenomenology via reheating in light of primordial gravitational waves and the latest BICEP/$Keck$ data
• Measuring Inflaton Couplings via Primordial Gravitational Waves
• On Dark Matter Interactions with the Standard Model through an Anomalous $Z^{\prime }$
• $Z^{\prime }$ portal to Chern-Simons Dark Matter
• Inflation and Leptogenesis in High-Scale Supersymmetry
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• Anomalous U(1)'s, Chern-Simons couplings and the Standard Model
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