Radiative corrections from an asymmetric Dirac fermion generate a bias that collapses domain walls, producing gravitational waves that encode the asymmetry level and temperature.
Matsumotoet al., Astrophys
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Conventional BBN fitting for negative Delta N_eff is unphysical; a consistent treatment via entropy dilution after neutrino decoupling yields significantly different bounds.
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.
Updated bounds on constant and redshift-dependent neutrino degeneracy parameters are derived from Planck+SPT+ACT CMB, DESI BAO, and BBN data, with a reported 95% CL preference for non-zero positive ξ_νe at BBN in the non-degenerate scenario.
citing papers explorer
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Imprint of matter-antimatter asymmetry on collapsing domain walls
Radiative corrections from an asymmetric Dirac fermion generate a bias that collapses domain walls, producing gravitational waves that encode the asymmetry level and temperature.
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Consistent $N_{\rm eff}$ fitting in big bang nucleosynthesis analysis
Conventional BBN fitting for negative Delta N_eff is unphysical; a consistent treatment via entropy dilution after neutrino decoupling yields significantly different bounds.
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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.
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Probing the neutrino chemical potential with cosmological observations
Updated bounds on constant and redshift-dependent neutrino degeneracy parameters are derived from Planck+SPT+ACT CMB, DESI BAO, and BBN data, with a reported 95% CL preference for non-zero positive ξ_νe at BBN in the non-degenerate scenario.