Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SCET, Light-Cone Gauge and the T-Wilson Lines   Soft-Collinear Effective Theory (SCET) has been formulated since a decade now
in covariant gauges. In this work we derive a modified SCET Lagrangian
applicable in both classes of gauges: regular and singular ones. This extends
the range of applicability of SCET. The new Lagrangian must be used to obtain
factorization theorems in cases where the transverse momenta of the particles
in the final states are not integrated over, such as semi-inclusive deep
inelastic scattering, Drell-Yan and the Higgs production cross-section at low
transverse momentum. By doing so all non-perturbative matrix elements appearing
in the factorized cross-sections are gauge invariant.

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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: stat