Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Forests, Groves and Higgs Bosons: Gauge Invariance Classes in
  Spontaneously Broken Gauge Theories   We determine the gauge invariance classes of tree level Feynman diagrams in
spontaneously broken gauge theories, providing a proof for the formalism of
gauge and flavor flips. We find new gauge invariance classes in theories with a
nonlinearly realized scalar sector. In unitarity gauge, the same gauge
invariance classes correspond to a decomposition of the scattering amplitude
into pieces that satisfy the relevant Ward Identities individually. In theories
with a linear realized scalar sector in R_\xi gauge, no additional nontrivial
gauge invariance classes exist compared to the unbroken case.

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The categories of this paper are: econ
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The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: cs
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int