Open and Hidden Heavy-flavour Hadron Production in Small Systems with ALICE

Measurements of quarkonia (heavy quark and antiquark bound states) and open-heavy flavour hadrons in hadronic collisions provide a unique testing ground for understanding quantum chromodynamics (QCD). Although recently there was significant progress, our understanding of hadronic collisions has been challenged by the observation of intriguing effects in high-multiplicity proton–proton (\(pp\)) and \(p\)–Pb collisions, such as collective phenomena. The excellent particle identification, track and decay-vertex reconstruction capabilities of the ALICE experiment are exploited to measure quarkonia as well as open-heavy flavour hadron production at midrapidity while quarkonium measurements are inclusive at forward rapidity. In this contribution, the first measurements of the elliptic flow (\(v_2\)) of \(J/\psi \) in high multiplicity \(pp\) collisions are shown. New measurements of quarkonium and open-beauty hadron production in \(pp\) and \(p\)–Pb collisions are presented, such as the first measurement of the non-prompt \({D}^{*+}\) polarization in \(pp\) collisions at \(\sqrt {s}=13\) TeV. The comparison of results with available models is also discussed.