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- W2334447992 abstract "We extract the strong coupling αs(mτ2) from the recently updated ALEPH non-strange spectral functions obtained from hadronic τ decays. We apply a self-consistent analysis method, first tested in the analysis of OPAL data, to extract αs(mτ2) and non-perturbative contributions. The analysis yields αsFO(mτ2)=0.296±0.010, using Fixed Order Perturbation Theory (FOPT), and αsCI(mτ2)=0.310±0.014, using Contour Improved Perturbation Theory (CIPT). The weighted average of these results with those previously obtained from OPAL data give αsFO(mτ2)=0.303±0.009 and αsCI(mτ2)=0.319±0.012, which gives, after evolution to the Z boson mass scale, αsFO(mZ2)=0.1165±0.0012 and αsCI(mZ2)=0.1185±0.0015, respectively. We observe that non-perturbative effects limit the accuracy with which αs can be extracted from τ decay data." @default.
- W2334447992 created "2016-06-24" @default.
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- W2334447992 date "2016-01-01" @default.
- W2334447992 modified "2023-10-16" @default.
- W2334447992 title "α s from the updated ALEPH data for hadronic τ decays" @default.
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- W2334447992 doi "https://doi.org/10.1016/j.nuclphysbps.2016.02.022" @default.
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