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We investigate the impact of theoretical uncertainties on the accuracy ofmeasurements involving hadronic jets. The analysis is performed using eventswith a Z boson and a single jet observed in $p\bar{p}$ collisions at $\sqrt{s}$= 1.96 TeV in 4.6 $\mathrm{fb^{-1}}$ of data from the Collider Detector atFermilab (CDF). The transverse momenta (\pt) of the jet and the boson shouldbalance each other due to momentum conservation in the plane transverse to thedirection of the $p$ and $\bar{p}$ beams. We evaluate the dependence of themeasured \pt-balance on theoretical uncertainties associated with initial andfinal state radiation, choice of renormalization and factorization scales,parton distribution functions, jet-parton matching, calculations of matrixelements, and parton showering. We find that the uncertainty caused by partonshowering at large angles is the largest amongst the listed uncertainties. Theproposed method can be re-applied at the LHC experiments to investigate andevaluate the uncertainties on the predicted jet energies. The distributionsproduced at the CDF environment are intended for comparison to those frommodern event generators and new tunes of parton showering.

Present Limits on the Precision of SM Predictions for Jet Energies