Star formation rate as a function of Mach number. Dashed-lines correspond to the log-normal PDF and solid lines to the Castaing-Hopkins PDF. Blue lines stand for the complete expression of the SFR whereas orange lines represent the SFR obtained without the truncation term (see Eq. 26). The model parameters are L = 200 pc, b = 0.67, n₀ = 1.5 cm⁻³ and η_d = 0.2 (top) or η_d = 0.5 (bottom).