Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints on the I=1 hadronic tau decay and e^+e^- --> hadrons data
  sets and implications for (g-2)_mu   Sum rule tests are performed on the spectral data for (i) flavor 'ud' vector-
current-induced hadronic tau decays and (ii) e^+ e^- hadroproduction, in the
region below s~3-4 GeV^2, where discrepancies exist between the isospin-
breaking-corrected charged and neutral current I=1 spectral functions. The tau
data is found to be compatible with expectations based on high-scale
alpha_s(M_Z) determinations, while the electroproduction data displays two
problems. The results favor determinations of the leading order hadronic
contribution to (g-2)_mu which incorporate hadronic tau decay data over those
employing electroproduction data only, and hence a reduced discrepancy between
experiment and the Standard Model prediction for (g-2)_mu.

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The categories of this paper are: cmp-lg
2
The categories of this paper are: math
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The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: chem-ph