Measurement of jet energy scale corrections using top quark events

A least-square kinematic fit using Lagrange multipliers is applied to enforce the mass constraints in the reconstructed $pp \rightarrow t{\bar t} \rightarrow q{\bar q}b\mu\nu_{\mu}{\bar b}$ events. Both the W boson mass and the top quark mass in the hadronic top quark decay, $t \rightarrow Wb \rightarrow q{\bar q}b$, are constrained to agree with their measured values. Residual corrections are estimated on the energy scale of the jets arising from both the light quarks in the W boson decay and the heavier bottom quark in the top quark decay. Utilizing the first integrated luminosity of 100pb$^{-1}$ of proton collisions at 14 TeV detected by the CMS detector, an uncertainty smaller than 1\% can be obtained on the jet energy scale for both light and heavy jets. This analysis is based on detailed simulations of both the physics processes and the detector responds.