Does a Torsion-Regulated Bounce Shift the Neutrino-to-Photon Temperature Ratio? A Computed Bound on the Effect

A torsion-regulated bounce at the neutron-carrier density of 9.72e+57 kilograms per cubic metre cannot measurably shift the neutrino-to-photon temperature ratio. The plasma density at neutrino decoupling is only 1.31e+10 kilograms per cubic metre, some 47.9 orders of magnitude below the bounce density, and the fractional shift in the temperature ratio is bounded above by 1.4e-48 under the scaling argument developed here. This is a negative result, stated plainly: the frame supplies no correction to the temperature ratio, and any claimed bounce signature in that ratio would contradict the frame's own density scale. This paper derives the bound, checks it against the electron-carrier branch as a limiting case, and identifies the one circumstance, a bounce far below the stated density, in which the conclusion would change. Computed, not measured.