| Autor: |
Hao Liang, LingFeng Li, Yongfeng Zhu, Xiaoyan Shen, Manqi Ruan |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Journal of High Energy Physics, Vol 2024, Iss 12, Pp 1-25 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1029-8479 |
| DOI: |
10.1007/JHEP12(2024)071 |
| Popis: |
Abstract This study investigates the precision measurement of the CKM matrix element |V cb | through semileptonic WW events at future Higgs factories, i.e., FCC-ee, ILC, C3, and CEPC. We use full detector simulation to generate the WW → ℓνcb signal events and various backgrounds at s $$ \sqrt{s} $$ = 240 GeV with unpolarized beams. The relative statistical uncertainties of |V cb | are projected to be 0.91% for the muon channel and 1.2% for the electron channel, assuming a baseline integrated luminosity of 5 ab−1. The sensitivities at other Higgs factory scenarios are also projected. Possible contributors to systematic uncertainties are discussed, with the most prominent one being the systematics of flavor-tagging and mistagging rates. Combining with WW threshold runs, the relative systematic uncertainty can be further reduced. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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