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 off RHN production early.
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Bubble collisions in a seesaw model produce right-handed neutrinos that source novel gravitational waves detectable by LISA, ET, and LVK while allowing the lightest RHN to explain dark matter or enable leptogenesis.
Constraints on temperature-dependent CPT-violating electron-positron mass asymmetry b0(T) = α T² from BBN abundances of 4He, D, and Neff give α ≳ 10^{-6} GeV^{-1} for keV-scale effects at BBN.
citing papers explorer
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Leptogenesis and Low Reheating Temperatures
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 off RHN production early.
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Cosmic Collider Gravitational Waves sourced by Right-handed Neutrino production from Bubbles: Testing Seesaw, Leptogenesis and Dark Matter
Bubble collisions in a seesaw model produce right-handed neutrinos that source novel gravitational waves detectable by LISA, ET, and LVK while allowing the lightest RHN to explain dark matter or enable leptogenesis.
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Temperature-Dependent CPT Violation: Constraints from Big Bang Nucleosynthesis
Constraints on temperature-dependent CPT-violating electron-positron mass asymmetry b0(T) = α T² from BBN abundances of 4He, D, and Neff give α ≳ 10^{-6} GeV^{-1} for keV-scale effects at BBN.