2PCF of BOSS galaxies, including w _p (left), ξ ₀(middle), and ξ ₂ (right) for all three redshift bins. The lines are the prediction of the best-fit model with varying cosmology, HOD, and assembly bias parameter, assuming the fiducial model for the covariance matrix (see more details in Section 6.1). The best-fit model uses data from w _p + ξ ₀ + ξ ₂. The results for low-z and high-z are shifted slightly for plotting purposes.