Lithium-7 Abundance: Big Bang BBN vs BFUT Steady-State

A Proof-of-Concept Simulation · Vijay Shankar Sharma · vijayshankarsharma.com
⚡ Big Bang Nucleosynthesis (BBN)
Li-7 (BBN — frozen at 5.6×10⁻¹⁰)
He-4 mass fraction (scaled)
— Observed Li-7 target (1.6×10⁻¹⁰)
— BBN prediction (5.6×10⁻¹⁰)
∞ BFUT Steady-State (Continuous Nucleosynthesis)
Li-7 photospheric (converging to equilibrium)
— ISM reservoir [Li/H] = 2×10⁻⁹ (measured)
— Observed Spite plateau (1.6×10⁻¹⁰)
He-4 (binding energy driven, ×10 scaled)
BBN Result
Predicted Li-7: 5.6 × 10⁻¹⁰
Observed Li-7: 1.6 × 10⁻¹⁰
Discrepancy: 3.5× ✗ Unresolved
Li-7 frozen at freeze-out. Stellar depletion cannot account for the full factor. Three decades of proposed fixes. No consensus resolution.
BFUT Result
Equilibrium Li-7: converging...
Observed Li-7: 1.6 × 10⁻¹⁰
Match: —
ISM reservoir [2×10⁻⁹] ÷ convective depletion [12×] = 1.67×10⁻¹⁰. Both inputs independently measured. No free parameters.
Initialising simulation...
Light Element Abundances: BBN vs BFUT vs Observed
Green = observed target · Red bar = BBN prediction · Blue bar = BFUT steady-state · He-4 mass fraction shown ×10 for scale