The experimental results for f n↑/ϵF for FB (green circles) and FF (red squares) are compared with equation ( 3 ), with f given by the static limit of the Fermi-liquid theory of equation ( 2 ) (green and red solid lines refer to FB and FF cases, respectively) for interaction values of | X | > 1. The plot refers to the repulsive and attractive branches for negative and positive values of X , respectively. The error bars on f n↑/ϵF correspond to the uncertainties of the linear fit and the errors on the Fermi energy. The error bars on X , smaller than the symbol size, represent the standard errors for each set of measurements.
