We compute the shear viscosity, thermal conductivity, and spin diffusivity of a Fermi gas with short-range interactions in the Fermi liquid regime of the normal phase, that is, at temperatures $T$ much lower than the Fermi temperature $T_{\mathrm{F}}$ and larger than the superfluid critical temperature $T_c$. In line with recent advances in the precision of cold atom experiments, we provide exact results up to the second order in the interaction strength. We extend the Landau-Salpeter equation to compute the collision amplitude beyond the forward-scattering limit, covering all collisions on the Fermi surface. We treat the collision kernel exactly, leading to significant corrections beyond relaxation-time or variational approximations. The transport coefficients, as functions of the $s$ wave scattering length $a$ and Fermi wave number $k_{\mathrm{F}}$, follow $(1+\gamma k_{\mathrm{F}}a)/a^2$ up to corrections of order $O(a^0)$, with a positive coefficient $\gamma$ for the viscosity and negative one for the thermal conductivity and spin diffusivity.

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• BCS-BEC crossover
• Fermi gases
• Quantum transport
• Quasiparticles & collective excitations
• Ultracold gases
• Fermi liquid theory