Light quark jet energy scale calibration using the W mass constraint in single-leptonic ttbar events

In the search for new physics or when aiming for precise measurements in hadron collisions, the knowledge of the absolute energy scale of reconstructed jets originating from the quarks in the high-Q2 collision is crucial. One can invert the process and determine via the precisely measured W boson mass the absolute energy scale of the reconstructed jets in the observed W -> qq decay. In this note an estimate is presented of the precision that can be obtained using hadronic W bosons in the huge sample of ttbar -> bWbW -> bqqblv events to be collected by the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC). It is shown that a statistical precision of better than 1% on the absolute jet energy scale can be obtained using around 0.5 fb-1 of integrated luminosity. The influence of combinatorial and process background on this estimator is below 0.2% . The effect on the absolute jet energy scale when adding pile-up collisions is estimated to be 3% .