Determining $\alpha_s$ from hadronic $\tau$ decay: the pitfalls of truncating the OPE
We discuss sum-rule determinations of $\alpha_s$ from non-strange hadronic $\tau$-decay data. We investigate, in particular, the reliability of the assumptions underlying the ``truncated OPE strategy,'' which specifies a certain treatment of non-perturbative contributions, and which was...
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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.1.053 |