Multi-strange particle measurements in 7 TeV proton-proton and 2.76 TeV PbPb collisions with the ALICE experiment at the LHC

Understand

The production of charged multi-strange particles is studied with the ALICE experiment at the CERN LHC.

• Measurements of the central rapidity yields of $\Xi^-$ and $\Omega^-$ baryons, as well as their antiparticles, are presented as a function of transverse momentum ($p_\mathrm{t}$) for inelastic pp collisions at $\sqrt{s}=7$ TeV and compared to existing measurements performed at the same and/or at lower energies.
• The results are also compared to predictions from two different tunes of the PYTHIA event generator.
• We find that data significantly exceed the production rates from those models.