Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Equivalence of renormalized covariant and light-front perturbation
  theory: I. Longitudinal divergences in the Yukawa model   Light-front perturbation theory has been proposed as an alternative to
covariant perturbation theory. Light-front perturbation theory is only
acceptable if it produces invariant S-matrix elements. Doubts have been raised
concerning the equivalence of light-front and covariant perturbation theory.
One of the obstacles to a rigorous proof of equivalence is the occurrence of
longitudinal divergences not present in covariant perturbation theory. We show
in the case of the Yukawa model of fermions interacting with scalar bosons at
the one-loop level how to deal with the longitudinal divergences. Invariant
S-matrix elements are obtained using our method.

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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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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: chem-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-alg
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The categories of this paper are: physics
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The categories of this paper are: cond-mat
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The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: cs