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Accurate jet charge identification is essential for precise electroweak andflavor measurements at the high-energy frontier. We propose a novel methodcalled the Leading Particle Jet Charge method (LPJC) to determine the jetcharge based on information about the leading charged particle. Tested on Z -bb and Z - cc samples at a center-of-mass energy of 91.2GeV, the LPJC achievesan effective tagging power of 20%/9% for the c/b jet, respectively. Combinedwith the Weighted Jet Charge method (WJC), we develop a Heavy Flavor Jet Chargemethod (HFJC), which achieves an effective tagging power of 39%/20% for c/bjet, respectively. This paper also discusses the dependencies between jetcharge identification performance and the fragmentation process of heavy flavorjets, and critical detector performances.

Jet charge identification in ee-Z-qq process at Z pole operation