Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Predictions of ZFITTER v.6 for fermion-pair production with
  acollinearity cut   ZFITTER is a Fortran package for the description of fermion-pair production
in e+e- annihilation. We report on results of a rederivation of the complete
set of analytical O(alpha) formulae for the treatment of photonic corrections
to the total cross-section and the integrated forward-backward asymmetry with
combined cuts on acollinearity angle, acceptance angle, and minimal energy of
the fermions. Numerically, the following changes result in ZFITTER v. 6.11
compared to ZFITTER v. 5.20/21: (i) at the Z resonance -- numerical changes are
negligible; (ii) at LEP 1 energies off-resonance -- corrections amount to at
most few per mil; (iii) at LEP 2 energies -- corrections amount to one per cent
or less. Thus, the predictions for LEP/SLC data remain unchanged within the
actual errors.

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The categories of this paper are: nucl-th
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The categories of this paper are: stat
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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: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
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The categories of this paper are: math
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: astro-ph