Decoupling of the Three Neutrino Flavours at Different Times

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. The three active flavours do not decouple together. Electron neutrinos interact through both charged and neutral currents with the electron-positron plasma, while muon and tau neutrinos, whose charged-current partners are absent at megaelectronvolt temperatures, interact only through neutral currents and decouple earlier. The calculation gives the following headline values: electron_neutrino_T_MeV = 1.4853079412171946, muon_neutrino_T_MeV = 1.741884173272449, tau_neutrino_T_MeV = 1.741884173272449, separation_MeV = 0.2565762320552545, 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.