@book{ce672dfe215e4ede862d3f6fddbfda8c,
title = "Improved b-jet Energy Correction for H→bb¯ Searches at CDF",
abstract = "We present a method for improving the $b$-jet energy resolution in order to improve the signal sensitivity in searches for particles decaying to a $b$ quark and anti-$b$ quark. A correction function is computed for individual jets, which combines information from the secondary vertex tagger, the offline tracking and standard calorimeter-based jet-energy reconstruction algorithm in order to provide a more accurate measurement of the true $b$-quark energy. We apply the correction to Monte-Carlo-simulated jets in the process $WH \rightarrow \ell \nu b\bar b$ and find an improvement in both the mean and the resolution of the $b$-jet energy with respect to the $b$-quark energy. The correction improves the measured Higgs dijet invariant mass resolution from $\sim$ 15%(standard jet corrections) to $\sim$ 11%(improved jet corrections) in the Higgs mass range from 100 GeV/$c^2$ - 150 GeV/$c^2$. Using the corrected $b$-jet energies instead of the standard calorimeter-based $b$-jet energies results in a $\sim$ 9% improvement in the expected sensitivity for Higgs boson production cross section in the most sensitive search region of the $WH \rightarrow \ell \nu b\bar b$ analysis, which is two tagged jets and one charged central lepton. ",
keywords = "114 Physical sciences",
author = "Aaltonen, {Timo Antero} and A. Buzatu and B. Kilminster and Y. Nagai and W. Yao and {CDF Collaboration} and {D0 Collaboration}",
year = "2011",
month = jul,
language = "English",
series = "Fermilab Technical Publications",
number = "FERMILAB-TM-2513-PPD",
}