Bifold Quantum Gravity Applications: Neutrino Physics

Abstract This paper is a follow-up application of the Bifold quantum gravity framework. Starting from the dual-SU(2) structure, C_\pm dynamics, and C_\pm matrix geometry of Ref. [1], we systematically derive neutrino masses, mass ordering, mixing angles, the CP phase, the Majorana nature, short-baseline anomalies, and six quantitative predictions. The three neutrino masses are m_1\approx0.023 eV, m_2/m_1=1.017, m_3/m_1=\sqrt2, with the ratio 1:1.017:\sqrt2 close to experiment; the mass ordering is m_1<m_2<m_3. The three mixing angles are \theta_{13}=7.5^\circ, \theta_{12}=32.0^\circ, \theta_{23}=51.2^\circ. The neutrino CP phase is \delta=-90^\circ, consistent with the negative-phase preference of T2K 2026 [9]. Neutrinos are Majorana particles, lepton number is violated, the 0\nu\beta\beta half-life is \sim10^{40} yr, and the process is invisible to current experiments. The short-baseline anomaly gives \delta P/P\sim1\%, not inconsistent with the \sim0.1\%–1\% level corresponding to the LSND/MiniBooNE anomaly. Six quantitative predictions are: an extra transition amplitude from the inter-sector compactness difference, \epsilon_\theta\approx1.7\%; decoherence \Gamma\propto E^{-1} (n=-1, not covered by IceCube); a matter-penetration probability correction 2\epsilon_\theta\approx+3.4\%; LIV \eta\sim E^2/M_P^2 (100 TeV crossing); magnetic moment \mu_\nu\sim10^{-19}\mu_B (compact correction 10^{-33}\mu_B negligible); and leptogenesis \eta_B\sim4.7\times10^{-10}.