Exploring the $t\bar{t}$ threshold at an electron-positron collider
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866915871641829376 |
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| author | Li, Leyan Lin, Yuming Sun, Xiaohu Mao, Yajun Li, Zhan Zhang, Kaili Wang, Shudong Li, Gang Liao, Hongbo Fang, Yaquan |
| author_facet | Li, Leyan Lin, Yuming Sun, Xiaohu Mao, Yajun Li, Zhan Zhang, Kaili Wang, Shudong Li, Gang Liao, Hongbo Fang, Yaquan |
| contents | Future electron-positron colliders offer a unique opportunity for high-precision measurements of the top-quark mass, width, strong coupling constant, and top-quark Yukawa coupling via a scan of the $t\bar{t}$ threshold. We present the first prospect study of the simultaneous determination of these parameters, incorporating the latest reference detector design for the Circular Electron-Positron Collider (CEPC). We find that the precision of the top-quark mass measurement can reach a few MeV excluding the theoretical uncertainty on the cross-section, which is nearly two orders of magnitude better than the high-luminosity LHC (HL-LHC) projections. The current theoretical uncertainty of the cross-section calculation is the limiting factor. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_17454 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Exploring the $t\bar{t}$ threshold at an electron-positron collider Li, Leyan Lin, Yuming Sun, Xiaohu Mao, Yajun Li, Zhan Zhang, Kaili Wang, Shudong Li, Gang Liao, Hongbo Fang, Yaquan High Energy Physics - Phenomenology Future electron-positron colliders offer a unique opportunity for high-precision measurements of the top-quark mass, width, strong coupling constant, and top-quark Yukawa coupling via a scan of the $t\bar{t}$ threshold. We present the first prospect study of the simultaneous determination of these parameters, incorporating the latest reference detector design for the Circular Electron-Positron Collider (CEPC). We find that the precision of the top-quark mass measurement can reach a few MeV excluding the theoretical uncertainty on the cross-section, which is nearly two orders of magnitude better than the high-luminosity LHC (HL-LHC) projections. The current theoretical uncertainty of the cross-section calculation is the limiting factor. |
| title | Exploring the $t\bar{t}$ threshold at an electron-positron collider |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2603.17454 |