Tau-decay determination of the strong coupling
We review the current status of the determination of the strong coupling from tau decay. Using the most recent release of the ALEPH data, a very comprehensive phenomenological analysis has been performed, exploring all strategies previously considered in the literature and several complementary appr...
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| Format: | Article |
| Language: | English |
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SciPost
2019-02-01
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| Series: | SciPost Physics Proceedings |
| Online Access: | https://scipost.org/SciPostPhysProc.1.036 |
| _version_ | 1819282355622248448 |
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| author | Antonio Pich |
| author_facet | Antonio Pich |
| author_sort | Antonio Pich |
| collection | DOAJ |
| description | We review the current status of the determination of the strong coupling from tau decay. Using the most recent release of the ALEPH data, a very comprehensive phenomenological analysis has been performed, exploring all strategies previously considered in the literature and several complementary approaches. Once their actual uncertainties are properly assessed, the results from all adopted methodologies are in excellent agreement, leading to a very robust and reliable value of the strong coupling, $\alpha_s^{(n_f=3)}(m_\tau^2) = 0.328\pm 0.013$, which implies $\alpha_s^{(n_f=5)}(M_Z^2) = 0.1197\pm 0.0015$. |
| first_indexed | 2024-12-24T01:14:16Z |
| format | Article |
| id | doaj.art-d6570af9dd4947c8b912f557f8ded0af |
| institution | Directory Open Access Journal |
| issn | 2666-4003 |
| language | English |
| last_indexed | 2024-12-24T01:14:16Z |
| publishDate | 2019-02-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics Proceedings |
| spelling | doaj.art-d6570af9dd4947c8b912f557f8ded0af2022-12-21T17:22:48ZengSciPostSciPost Physics Proceedings2666-40032019-02-01103610.21468/SciPostPhysProc.1.036Tau-decay determination of the strong couplingAntonio PichWe review the current status of the determination of the strong coupling from tau decay. Using the most recent release of the ALEPH data, a very comprehensive phenomenological analysis has been performed, exploring all strategies previously considered in the literature and several complementary approaches. Once their actual uncertainties are properly assessed, the results from all adopted methodologies are in excellent agreement, leading to a very robust and reliable value of the strong coupling, $\alpha_s^{(n_f=3)}(m_\tau^2) = 0.328\pm 0.013$, which implies $\alpha_s^{(n_f=5)}(M_Z^2) = 0.1197\pm 0.0015$.https://scipost.org/SciPostPhysProc.1.036 |
| spellingShingle | Antonio Pich Tau-decay determination of the strong coupling SciPost Physics Proceedings |
| title | Tau-decay determination of the strong coupling |
| title_full | Tau-decay determination of the strong coupling |
| title_fullStr | Tau-decay determination of the strong coupling |
| title_full_unstemmed | Tau-decay determination of the strong coupling |
| title_short | Tau-decay determination of the strong coupling |
| title_sort | tau decay determination of the strong coupling |
| url | https://scipost.org/SciPostPhysProc.1.036 |
| work_keys_str_mv | AT antoniopich taudecaydeterminationofthestrongcoupling |