Ratio between differential cross section measurements and theory predictions for ATLAS , CMS  and ALICE. Theory predictions are obtained with JETPHOX and CTEQ 6.6 PDFs for ATLAS, and JETPHOX and CT14 PDFs for CMS and ALICE. Only experimental uncertainties are shown here. Error bars are statistical and boxes are the quadratic sum of statistical and systematic uncertainties. The normalisation uncertainty of each experiment is presented as an overall box around unity.