Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Calculation of two-loop self-energies in the electroweak Standard Model   Motivated by the results of the electroweak precision experiments, studies of
two-loop self-energy Feynman diagrams are performed. An algebraic method for
the reduction of all two-loop self-energies to a set of standard scalar
integrals is presented. The gauge dependence of the self-energies is discussed
and an extension of the pinch technique to the two-loop level is worked out. It
is shown to yield a special case of the background-field method which provides
a general framework for deriving Green functions with desirable theoretical
properties. The massive scalar integrals of self-energy type are expressed in
terms of generalized multivariable hypergeometric functions. The imaginary
parts of these integrals yield complete elliptic integrals. Finally,
one-dimensional integral representations with elementary integrands are derived
which are well suited for numerical evaluation.

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The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
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The categories of this paper are: stat
31
The categories of this paper are: ao-sci
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics