Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Higher-order Coulomb Corrections to the Threshold e+ e- --> W+ W- Cross
  Section   The QED Coulomb correction is one of the most important corrections to the e+
e- --> W+ W- total cross section near threshold. We calculate these corrections
through second order, and discuss the implications for extracting M_W from a
threshold cross section measurement at LEP2. Analytic expressions are derived
in various kinematic limits.

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The categories of this paper are: astro-ph
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The categories of this paper are: econ
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: cs
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: math