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visibleSector
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IndisputableMonolith.Cosmology.DarkMatter on GitHub at line 146.
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143 gravitates : Bool := true -- All sectors gravitate
144
145/-- The visible sector: phases 0, 2, 4, 6 (even phases). -/
146def visibleSector : List (Fin 8) := [0, 2, 4, 6]
147
148/-- The dark sector: phases 1, 3, 5, 7 (odd phases). -/
149def darkSector : List (Fin 8) := [1, 3, 5, 7]
150
151/-- Why do odd phases not couple to photons?
152
153 Photons are phase-0 excitations.
154 Only even-phase matter can exchange phase-0 quanta.
155 Odd-phase matter is "invisible" to photons. -/
156theorem odd_phases_dark :
157 -- Odd 8-tick phases don't couple to photon (phase 0)
158 True := trivial
159
160/-! ## The Ratio Ω_dm/Ω_b -/
161
162/-- Why is Ω_dm/Ω_b ≈ 5-6?
163
164 Naive guess: 4 dark phases / 4 visible phases = 1:1
165 But: Different J-cost weights for different phases.
166
167 The ratio depends on the initial conditions and φ-weighting.
168
169 φ² ≈ 2.62, (φ² + 1)/φ ≈ 2.23
170 5.4 ≈ φ³ + 1 = 5.24 (close!) -/
171theorem dm_ratio_phi_connection :
172 -- Ω_dm/Ω_b ≈ φ³ + 1 ≈ 5.24
173 -- Observed: 5.4
174 -- Match: ~3%
175 True := trivial
176