Charm-quark fragmentation-fraction ratio $\f{s}/(\f{u}+\f{d})$ compared with previous measurements performed by the ALICE , H1 , ZEUS , and ATLAS  Collaborations and to the average of LEP measurements . The total experimental uncertainties (bars) and the theoretical uncertainties (shaded boxes) are shown. The experimental measurements are compared to the value obtained from PYTHIA 8 simulations with Monash-13 tune  .