Jet energy scale uncertainty correlations between ATLAS and CMS at $\sqrt{s}=8$ TeV

An evaluation of the correlations between ATLAS and CMS jet energy scale uncertainties is presented for $\sqrt{s}=8\,\mathrm{TeV}$ $pp$ collisions recorded in 2012. Uncertainties within each experiment are grouped based on the general type of systematic effect they are intended to cover and the means by which they are derived. Inter-experimental correlation value ranges are established for each corresponding group of uncertainty components. This correlation range is intended to cover the possible correlation values when performing combinations between the two experiments, where the most conservative value obtained from scanning over the correlation range should be used for the final combined measurement. The procedure described here is primarily aimed at single-observable analyses, and has limitations when applied to multi-observable measurements.