Lepton identification at particle flow oriented detector for the future [Formula omitted] Higgs factories

The lepton identification is essential for the physics programs at high-energy frontier, especially for the precise measurement of the Higgs boson. For this purpose, a toolkit for multivariate data analysis (TMVA) based lepton identification (LICH) has been developed for detectors using high granula...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2017-09, Vol.77 (9)
Main Authors: Yu, Dan, Ruan, Manqi, Boudry, Vincent, Videau, Henri
Format: Article
Language:English
Subjects:
Analysis
Detection equipment
Particle accelerators
Online Access:Get full text
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Summary:The lepton identification is essential for the physics programs at high-energy frontier, especially for the precise measurement of the Higgs boson. For this purpose, a toolkit for multivariate data analysis (TMVA) based lepton identification (LICH) has been developed for detectors using high granularity calorimeters. Using the conceptual detector geometry for the Circular Electron-Positron Collider (CEPC) and single charged particle samples with energy larger than 2 GeV, LICH identifies electrons/muons with efficiencies higher than 99.5% and controls the mis-identification rate of hadron to muons/electrons to better than 1/0.5%. Reducing the calorimeter granularity by 1-2 orders of magnitude, the lepton identification performance is stable for particles with [Formula omitted] GeV. Applied to fully simulated eeH/ [Formula omitted]H events, the lepton identification performance is consistent with the single particle case: the efficiency of identifying all the high energy leptons in an event, is 95.5-98.5%.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-017-5146-5