(Anti-)deuteron production in pp collisions at $$\sqrt{s}=13 \ \text {TeV}$$s=13TeV

The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of \n$$\\text {(anti-)deuterons}$$\n\n is studied as a function of the charged particle multiplicity in inelastic pp collisions at \n$$\\sqrt{s}=13$$\n\n TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity (\n$${\\mathrm {d} N_{ch}/\\mathrm {d} \\eta } \\sim 26$$\n\n) as measured in p–Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p–Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM).