Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Background Field Method and Generalized Field Redefinitions in Effective
  Field Theories   We study the non-linear background field redefinitions arising at the quantum
level in a spontaneously broken effective gauge field theory. The non-linear
field redefinitions are crucial for the symmetric (i.e. fulfilling all the
relevant functional identities of the theory) renormalization of
gauge-invariant operators. In a general $R_\xi$-gauge the classical
background-quantum splitting is also non-linearly deformed by radiative
corrections. In the Landau gauge these deformations vanish to all orders in the
loop expansion.

12
The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs