Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The back-to-back region in e^+e^- energy--energy correlation   We consider the back-to-back region in the energy--energy correlation in
e^+e^- collisions. We present the explicit expression of the O(as^2)
logarithmically enhanced contributions up to next-to-next-to-leading
logarithmic accuracy. We study the impact of the results in a detailed
comparison with precise LEP and SLC data. We find that, when hadronization
effects are taken into account as is customarily done in QCD analysis in e^+e^-
annihilations, the extracted value of as(M_Z) is in good agreement with the
current world average.

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The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
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The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
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The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph