Determination of Strong Coupling Constant from Inclusive Semileptonic Decays of Charmed Mesons
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| Format: | Preprint |
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2024
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| _version_ | 1866912239518220288 |
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| author | Wu, Jinfei Lou, Xinchou Che, Yuzhi Li, Gang Huang, Yanping Ruan, Manqi Ye, Jingbo |
| author_facet | Wu, Jinfei Lou, Xinchou Che, Yuzhi Li, Gang Huang, Yanping Ruan, Manqi Ye, Jingbo |
| contents | Employing the heavy quark expansion model with the kinetic scheme, we evaluate $α_S(m_c^2)$, the strong coupling constant at the charm quark mass $m_c$ with data on inclusive semileptonic decays of charmed mesons. Using the experimental values of semileptonic decay widths of the $D^0$ and the $D^+$, the value of $α_{s}(m_c^{2})$ is determined to be $0.445\pm0.009\pm0.114$, where the first uncertainty is experimental and the second systematic. This reported $α_{s}(m_c^{2})$ is in good agreement with the value of $α_{s}(m_c^{2})$ calculated by running $α_S(m_Z^2)$ at the $Z^0$ boson mass $m_Z$ with the renormalization group evolution equation. In addition, values of $α_{s}(m_c^{2})$ obtained individually from each of the $D^0$, $D^+$, and $D_s^+$ mesons are found to be consistent being of the same origin. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2406_16119 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Determination of Strong Coupling Constant from Inclusive Semileptonic Decays of Charmed Mesons Wu, Jinfei Lou, Xinchou Che, Yuzhi Li, Gang Huang, Yanping Ruan, Manqi Ye, Jingbo High Energy Physics - Phenomenology High Energy Physics - Experiment Employing the heavy quark expansion model with the kinetic scheme, we evaluate $α_S(m_c^2)$, the strong coupling constant at the charm quark mass $m_c$ with data on inclusive semileptonic decays of charmed mesons. Using the experimental values of semileptonic decay widths of the $D^0$ and the $D^+$, the value of $α_{s}(m_c^{2})$ is determined to be $0.445\pm0.009\pm0.114$, where the first uncertainty is experimental and the second systematic. This reported $α_{s}(m_c^{2})$ is in good agreement with the value of $α_{s}(m_c^{2})$ calculated by running $α_S(m_Z^2)$ at the $Z^0$ boson mass $m_Z$ with the renormalization group evolution equation. In addition, values of $α_{s}(m_c^{2})$ obtained individually from each of the $D^0$, $D^+$, and $D_s^+$ mesons are found to be consistent being of the same origin. |
| title | Determination of Strong Coupling Constant from Inclusive Semileptonic Decays of Charmed Mesons |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2406.16119 |