Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An effective field theory approach to the electroweak corrections at LEP
  energies   In the framework of the effective field theory (EFT) we discuss the
electroweak (EW) corrections at LEP energies. We obtain the effective
Lagrangian in the large m_t limit, and reproduce analytically the dominant EW
corrections to the LEP2 processes e+ e- --> gamma Z and e+ e- --> Z Z. To
include effects of finite top-quark and Higgs masses, we use the effective
Lagrangian at tree level and fit LEP1/SLD observables with four arbitrary
parameters, plus alpha_s(m_Z). The EFT approach works remarkably well. Using
the effective couplings determined from the fit, and tree-level EFT formulae,
we predict the cross sections for e+ e- --> Z Z, gamma Z at a level better than
1%.

21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat