| Abstract
The jet energy resolution comes from many sources, which can be grouped
into two categories: (1) detector effects such as calorimeter resolution,
and (2) physics effects such as fluctuations in the energy outside a
clustering cone.
We studied the physics uncertainties using
simulated W to jj events in order
to improve the low-mass tail in the
di-jet mass distribution. For the detector resolution
we used both CDF detector simulation and data.
For the first time the full granularity of the CDF detector is used
to perform corrections at "tower level" rather than at "jet level".
The track momenta measured by the
Central Tracking Chamber and the neutral cluster energies measured
by the Central Shower Max detector are used to correct the calorimeter
tower energies.
When tested on photon+jet data, our new algorithm
has shown an improvement on the jet energy resolution better than 25%
compared to the standard CDF jet corrections.
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