Measured α_⊥ and α_∥ (left) and β_Lyα and b_Lyα(1 + β_Lyα) (right) for the 100 mock catalogs including HCDs with N_HI> 10²⁰ cm² masked. There are four outliers on the left plot and two on the right. The horizontal and vertical blue lines show the weighted means of the distributions, also given in Table 4. The distribution and mean values of (α_⊥,α_∥) indicates no significant bias in the reconstruction of the BAO peak-position parameters.