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Thermoelectric power ($S$) and Hall effect ($R_\mathrm{H}$) measurements onthe paramagnetic superconductor UTe$_2$ with magnetic field applied along thehard magnetization $b$-axis are reported. The first order nature of themetamagnetic transition at $H_\mathrm{m}=H^b_\mathrm{c2}=35$~T leads to drasticconsequences on $S$ and $R_\mathrm{H}$. In contrast to the field dependence ofthe specific heat in the normal state through $H_\mathrm{m}$, $S(H)$ is notsymmetric with respect to $H_\mathrm{m}$. This implies a strong interplaybetween ferromagnetic (FM) fluctuations and a Fermi-surface reconstruction at$H_\mathrm{m}$. $R_\mathrm{H}$ is very well described by incoherent skewscattering above the coherence temperature $T_\mathrm{m}$ corresponding roughlyto the temperature of the maximum in the susceptibility $T_{\chi_\mathrm{max}}$and coherent skew scattering at lower temperatures. The discontinuous fielddependence of both, $S(H)$ and the ordinary Hall coefficient $R_0$, at$H_\mathrm{m}$ and at low temperature, provides evidence of a change in theband structure at the Fermi level.

Evidence of Fermi-Surface Reconstruction at the Metamagnetic Transition of the Strongly Correlated Superconductor UTe2