Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutron Transverse-Momentum Distributions and Polarized 3He within
  Light-Front Hamiltonian Dynamics   The possibility to extract the quark transverse-momentum distributions in the
neutron from semi-inclusive deep inelastic electron scattering off polarized
3He is illustrated through an impulse approximation analysis in the Bjorken
limit. The generalization of the analysis at finite momentum transfers in a
Poincare' covariant framework is outlined. The definition of the light-front
spin-dependent spectral function of a J=1/2 system allows us to show that
within the light-front dynamics only three of the six leading twist T-even
transverse-momentum distributions are independent.

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The categories of this paper are: econ
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: stat