Particle fraction as a function of the baryon density in units of ρ₀. The nucleonic part is described with the GM1 model. Results for the UC (SC) choice of parameters for the Δ–meson couplings are shown in the upper (lower) panels. Left and right panels: results for a case in which the d^*(2380) feels attraction (x_σd^* = x_ωd^* = 0.1) or repulsion (x_σd^* = x_ωd^* = −0.1), respectively. Dashed lines show the results for the free case for comparison.