Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\alpha_{s}$ from the (revised) ALEPH data for $\tau$ decay   We present a new analysis of $\alpha_s$ from hadronic $\tau$ decays based on
the recently revised ALEPH data. The analysis is based on a strategy which we
previously applied to the OPAL data. We critically compare our strategy to the
one traditionally used and comment on the main differences. Our analysis yields
the values $\alpha_s(m_\tau^2)=0.296\pm 0.010$ using fixed-order perturbation
theory, and $\alpha_s(m_\tau^2)=0.310\pm 0.014$ using contour-improved
perturbation theory. Averaging these values with our previously obtained values
from the OPAL data, we find $\alpha_s(m_\tau^2)=0.303\pm 0.009$, respectively,
$\alpha_s(m_\tau^2)=0.319\pm 0.012$, as the most reliable results for
$\alpha_s$ from $\tau$ decays currently available.

14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg