The inclusive production of the charm–strange baryon Omega0c is measured for the first time via its hadronic decay into Omega− π+ at midrapidity (|y| < 0.5) in proton–proton (pp) collisions at the centre-of-mass energy √s= 13 TeV with the ALICE detector at the LHC. The transverse momentum (pT) differential cross section multiplied by the branching ratio is presented in the interval 2 < pT < 12 GeV/c. The pT dependence of the Omega0c-baryon production relative to the prompt D0-meson and to the prompt Xi0c-baryon production is compared to various models that take different hadronisation mechanisms into consideration. In the measured pT interval, the ratio of the pT-integrated cross sections of Omega0c and prompt Lambda+c baryons multiplied by the Omega−π+ branching ratio is found to be larger by a factor of about 20 with a significance of about 4σ when compared to e+e− collisions.
