Jet charge identification in the e+e- → Z → q(q)over-bar process at Z pole

被引：0
作者：
Cui, Hanhua [1 ,2 ]
Zhao, Mingrui [3 ,4 ]
Wang, Yuexin [1 ,5 ]
Liang, Hao [1 ,2 ]
Ruan, Manqi [1 ]
机构：
[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[2] Univ Chinese Acad Sci UCAS, Beijing 100049, Peoples R China
[3] China Inst Atom Energy, Sci & Technol Nucl Data Lab, Beijing, Peoples R China
[4] Univ Copenhagen, Neils Bohr Inst, Copenhargen, Denmark
[5] China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2024年 / 05期
关键词：
e(+)-e(-) Experiments; Jets;
D O I：
10.1007/JHEP05(2024)210
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Accurate jet charge identification is essential for precise electroweak and flavor measurements at the high-energy frontier. We propose a novel method called the Leading Particle Jet Charge method (LPJC) to determine the jet charge based on information of the leading charged particle. Tested on Z -> b (b) over bar and Z -> c (c) over bar samples at center-of-mass energy of 91.2 GeV, the LPJC achieves an effective tagging power epsilon(eff) of 20%/9% for c/b jet, respectively. In combination with the Weighted Jet Charge method (WJC), we develop a Heavy Flavor Jet Charge method (HFJC), which achieves an effective tagging power epsilon(eff) of 39%/20% for c/b jet, respectively. This paper also discusses the dependencies between jet charge identification performance and the fragmentation process of heavy flavor jets, as well as critical detector performances.
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页数：28
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