Lepton Asymmetry Generated or Erased Across a Bounce
Year: 2026
Type: article
Abstract: This paper computes a specific neutrino quantity in a cosmology whose collapse is regulated by a maximum density, the Aldred Limit evaluated on its neutron branch at 9.72e+54 grams per cubic centimetre. A lepton asymmetry much larger than the baryon asymmetry is not excluded a priori, because charge neutrality constrains only the charged leptons. Whether a bounce would erase a pre-existing asymmetry, or generate one, decides what range of asymmetries a post-bounce universe can inherit. The calculation gives the following headline values: T_bounce_MeV = 1045027636488.8951, initial_asymmetry = 0.01, survival_fraction = 1.0, observed_bound = asymmetry below 0.01 from nucleosynthesis (order of magnitude), rhoA_kg_m3 = 9.717779835388742e+57. Each value is obtained from stated assumptions by the deposited script and is compared with published observational values where such values exist. Where the computed frame effect is far below observational reach, that negative result is stated plainly rather than softened. This study is simulated and computed from stated assumptions; it is not a measurement.
Author: Aldred, William Alexander
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7225816495
FWCI:
Cites:
Cited by:
Related to: