Don't miss the forest for the trees: the Lyman alpha forest power spectrum in effective field theory
The research develops a one-loop Effective Field Theory (EFT) to model fluctuations in the Lyman alpha forest power spectrum. By comparing a 'bottom-up' flux expansion with a 'top-down' optical depth map approach, the authors confirm theoretical consistency. This validated EFT model accurately fits hydrodynamic simulation data up to $k=3 h ext{Mpc}^{-1}$ at $z=2.8$, making it useful for analyzing Lyman alpha forest data.