First measurement of Ξc0 production in pp collisions at s=7 TeV

Abstract The production of the charm-strange baryon Ξ c 0 is measured for the first time at the LHC via its semileptonic decay into e Ξ − + ν e in pp collisions at s = 7 TeV with the ALICE detector. The transverse momentum ( p T ) differential cross section multiplied by the branching ratio is presented in the interval 1 p T 8  GeV / c at mid-rapidity, | y | 0.5 . The transverse momentum dependence of the Ξ c 0 baryon production relative to the D 0 meson production is compared to predictions of event generators with various tunes of the hadronisation mechanism, which are found to underestimate the measured cross-section ratio.