First determination of $V_{cs,cd}$ from inclusive $D$ meson decays
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915494291832832 |
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| author | Shao, Kang-Kang Feng, Hai-Long Liu, Xue-Yin Qin, Qin Sun, Liang Yu, Fu-Sheng |
| author_facet | Shao, Kang-Kang Feng, Hai-Long Liu, Xue-Yin Qin, Qin Sun, Liang Yu, Fu-Sheng |
| contents | We report the first determination of the Cabibbo-Kobayashi-Maskawa matrix elements $|V_{cs}|$ and $|V_{cd}|$ from a global fit to data from inclusive and sum-of-exclusive charm decays. Simultaneously, the heavy quark expansion parameters are determined, and they are in good agreement with results from the literature, validating the robustness of this work. With the current precision, our determined value for $|V_{cs}|$ is consistent with the world-average value extracted from exclusive charm decay processes, while a tension of approximately $3σ$ is observed for $|V_{cd}|$ when compared to its exclusive world-average counterpart. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_11404 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | First determination of $V_{cs,cd}$ from inclusive $D$ meson decays Shao, Kang-Kang Feng, Hai-Long Liu, Xue-Yin Qin, Qin Sun, Liang Yu, Fu-Sheng High Energy Physics - Phenomenology High Energy Physics - Experiment We report the first determination of the Cabibbo-Kobayashi-Maskawa matrix elements $|V_{cs}|$ and $|V_{cd}|$ from a global fit to data from inclusive and sum-of-exclusive charm decays. Simultaneously, the heavy quark expansion parameters are determined, and they are in good agreement with results from the literature, validating the robustness of this work. With the current precision, our determined value for $|V_{cs}|$ is consistent with the world-average value extracted from exclusive charm decay processes, while a tension of approximately $3σ$ is observed for $|V_{cd}|$ when compared to its exclusive world-average counterpart. |
| title | First determination of $V_{cs,cd}$ from inclusive $D$ meson decays |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2509.11404 |