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Soft-hadron measurements in high-energy collisions of small systems like p-Pband d-Au show peculiar qualitative features (long-range rapidity correlations,flattening of the $p_T$-spectra with increasing hadron mass and centrality,non-vanishing Fourier harmonics in the azimuthal particle distributions)suggestive of the formation of a strongly-interacting medium displaying acollective behaviour, with a hydrodynamic flow as a response to the pressuregradients in the initial conditions. Hard observables (high-$p_T$ jet andhadron spectra) on the other hand, within the current large systematicuncertainties, appear only midly modified with the respect to the benchmarkcase of minimum-bias p-p collisions. What should one expect for heavy-flavourparticles, initially produced in hard processes but tending, in thenucleus-nucleus case, to approach kinetic equilibrium with the rest of themedium? This is the issue we address in the present study, showing how thecurrent experimental findings are compatible with a picture in which theformation of a hot medium even in proton-nucleus collisions modifies thepropagation and hadronization of heavy-flavour particles.

Heavy-flavour production in high-energy d-Au and p-Pb collisions