Azimuthal distributions of $^3\overline{\mathrm{He}}$ nuclei in the transverse-momentum range $4 \leq p_{\mathrm{T}} 5.6$ GeV/$c$, fitted with periodic functions including even harmonics up to the fourth order. The experimental data are selected in the 40--60\% centrality interval, and the fit includes the second and fourth harmonics (blue line). See the text for details.