Comparison of theoretical predictions and simulated data. Left: monopole ξ₀(s) (solid) and dipole ξ₁(s) (dashed), scaled by s², vs. separation s (1–300 Mpc, 30 bins), with data points and 1% error bars. The BAO peak is at 100–150 Mpc. Right: monopole P₀(k) (solid) and dipole P₁(k) (dashed), scaled by k, vs. wavenumber k (0.001–2 Mpc⁻¹, 30 bins), with data points and error bars. Best-fit parameters: α = γ = β = 0.0.