Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quark Sivers Function at Small-$x$: Leading contribution from the
  Spin-Dependent Odderon   We present the calculation of the leading contribution to the quark Sivers
function at small-Bjorken $x$. This calculation uses the high energy scattering
approximation and operator formalism developed by Kovchegov and Sievert to
obtain a dominant contribution to the quark Sivers function coming from the
spin-dependent odderon, in agreement with the results of Dong, Zhen, and Zhou.
We then calculate this dominant contribution in the diquark model of the proton
to obtain a small-$x$ estimate for the Sivers function.

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The categories of this paper are: supr-con
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: stat
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The categories of this paper are: econ
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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: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: physics
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex