Measurement of CKM element |V cb | from W boson decays at the future Higgs factories
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 $$ \sqrt{s} $$...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-12-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP12(2024)071 |
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| _version_ | 1846112965212766208 |
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| author | Hao Liang LingFeng Li Yongfeng Zhu Xiaoyan Shen Manqi Ruan |
| author_facet | Hao Liang LingFeng Li Yongfeng Zhu Xiaoyan Shen Manqi Ruan |
| author_sort | Hao Liang |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-97cc2a57aecf4928ab93f720db89f7d8 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-97cc2a57aecf4928ab93f720db89f7d82024-12-22T12:08:53ZengSpringerOpenJournal of High Energy Physics1029-84792024-12-0120241212510.1007/JHEP12(2024)071Measurement of CKM element |V cb | from W boson decays at the future Higgs factoriesHao Liang0LingFeng Li1Yongfeng Zhu2Xiaoyan Shen3Manqi Ruan4Institute of High Energy Physics, Chinese Academy of SciencesDepartment of physics, Brown UniversityInstitute of High Energy Physics, Chinese Academy of SciencesInstitute of High Energy Physics, Chinese Academy of SciencesInstitute of High Energy Physics, Chinese Academy of SciencesAbstract 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.https://doi.org/10.1007/JHEP12(2024)071CKM ParametersJets and Jet SubstructureElectroweak Precision Physics |
| spellingShingle | Hao Liang LingFeng Li Yongfeng Zhu Xiaoyan Shen Manqi Ruan Measurement of CKM element |V cb | from W boson decays at the future Higgs factories Journal of High Energy Physics CKM Parameters Jets and Jet Substructure Electroweak Precision Physics |
| title | Measurement of CKM element |V cb | from W boson decays at the future Higgs factories |
| title_full | Measurement of CKM element |V cb | from W boson decays at the future Higgs factories |
| title_fullStr | Measurement of CKM element |V cb | from W boson decays at the future Higgs factories |
| title_full_unstemmed | Measurement of CKM element |V cb | from W boson decays at the future Higgs factories |
| title_short | Measurement of CKM element |V cb | from W boson decays at the future Higgs factories |
| title_sort | measurement of ckm element v cb from w boson decays at the future higgs factories |
| topic | CKM Parameters Jets and Jet Substructure Electroweak Precision Physics |
| url | https://doi.org/10.1007/JHEP12(2024)071 |
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