  This report is to provide a novel method for the lepton energy calibration at
Hadron Collider Experiments. The method improves the classic lepton energy
calibration procedure widely used at hadron collider experiments. The classic
method parameterizes the potential bias in the lepton en- ergy calibration, and
determines the value of the parameter by the invariant mass of
$Z/\gamma^*\rightarrow \ell^+\ell^-$ events. The precision of the calibration
is dominated by the number of parameters or terms consid- ered in the
parameterization, for example, a polynomial extension. With one physics
constraint of the reconstructed Z boson mass, the classic procedure can use and
determine one parameter. The novel method improves the precision of lepton
calibration by introducing more terms in the parameterization. To precisely
determine the values of multiple parameters, the method first ac- quires more
constraints by separating the $Z/\gamma^*\rightarrow \ell^+\ell^-$ samples
according to the decay kinematics, and then reduces the correlation between
multiple parameters. Since the new method is still using the reconstructed Z
boson masses as the only constraints, it is much faster and easier than
detailed study of detector simulations.
