Speaker
Dr
Haijun Yang
(University of Michigan)
Description
We report results of a study of the SM Higgs discovery potential through
the W-pair leptonic decay modes at the LHC with ATLAS detector. We used
MC samples with full detector simulation and reconstruction of the ATLAS
experiment to estimate the ATLAS detection sensitivity for the reaction of
pp->H->WW->ll nu nu. We first conducted a cut-based analysis, and then
performed multivariate analysis based on an advanced pattern recognition
algorithm - Boosted Decision Trees (BDT). By applying the BDT technique
in analysis the signal-to-background ratio in event selection and the
Higgs detection significance can be improved significantly by a factor
of about 2 depending on Higgs mass compared to that using cut-based
analysis. For early LHC run at 10 TeV center of mass energy, we also
estimate the detection sensitivity for SM Higgs through the W-pair
leptonic decay modes with about 200/pb integrated luminosity data.
