001     622848
005     20250130215924.0
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037 _ _ |a PUBDB-2025-00528
041 _ _ |a English
100 1 _ |a Reichenbach, Leonhard
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245 _ _ |a Identification of Charged Leptons in Jets at Future Higgs Factories
|c Leonhard Reichenbach. Gutachter: Prof. Dr. Erika Garutti, Dr. Jenny List
|f 2021-10-01 - 2022-12-01
260 _ _ |a Hamburg
|c 2022
300 _ _ |a 131
336 7 _ |a Output Types/Supervised Student Publication
|2 DataCite
336 7 _ |a Thesis
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336 7 _ |a MASTERSTHESIS
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336 7 _ |a masterThesis
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336 7 _ |a Master Thesis
|b master
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502 _ _ |a Masterarbeit, University of Hamburg, 2022
|c University of Hamburg
|b Masterarbeit
|d 2022
520 _ _ |a The 2012 discovery of the 12 GeV Higgs boson at the LHC, and of no other particle since then, have brought a consensus to the particle physics community that an e+e- Higgs factory is the highest priority next collider. However, Higgs measurements suffer from the loss of undetected neutrino energy due to semi-leptonic decays (SLDs) in the most common decay mode H to b anti-b. Previous work has shown the possibility to reconstruct the missing neutrino if the corresponding lepton and its production vertex are found. Search algorithms for these leptons are already in use to improve b-jet identification.In this work, a novel BDT-based method to identify SLD electrons and muons has been developed. Furthermore, a particle identification (PID) method for electrons and muons from jets was also built.The new PID can identify electrons with an efficiency of 95% and a purity of 98% given that dE/dx information is available. For muons, 74% efficiency and 89% purity were reached. Combined with this new PID, the developed SLD ID method can identify SLD electrons and muons with an efficiency of 65% and a purity of 77%.
536 _ _ |a 611 - Fundamental Particles and Forces (POF4-611)
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700 1 _ |a List, Jenny
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700 1 _ |a Garutti, Erika
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856 4 _ |u https://bib-pubdb1.desy.de/record/622848/files/masterarbeit.pdf
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910 1 _ |a External Institute
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910 1 _ |a Deutsches Elektronen-Synchrotron
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910 1 _ |a External Institute
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913 1 _ |a DE-HGF
|b Forschungsbereich Materie
|l Matter and the Universe
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|0 G:(DE-HGF)POF4-611
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|2 G:(DE-HGF)POF4-600
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|v Fundamental Particles and Forces
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920 _ _ |l yes
920 1 _ |0 I:(DE-H253)FTX-20210408
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980 _ _ |a master
980 _ _ |a VDB
980 _ _ |a I:(DE-H253)FTX-20210408
980 _ _ |a UNRESTRICTED


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