Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gamma^*, Z^* production in polarised p-p scattering as a probe of the
  proton spin structure   We present the results of a detailed study of the large transverse momentum
Drell-Yan process, pp --> (Gamma^*, Z^*)X --> l^+l^- X at collider energies,
with either one or both protons polarised, allowing the study of single- and
double-spin asymmetries respectively. We show how these asymmetries obtained
from angular distributions of the leptons in the Gamma^* (or Z^*) rest-frame,
can be used to get information on the polarised parton distributions. Numerical
results for the asymmetries and the cross-sections are presented, and the
sensitivity of the asymmetries to the initial parton distributions indicates
that these can be used as effective probes of the spin structure of the proton.

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The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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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: stat
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The categories of this paper are: acc-phys
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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: comp-gas
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The categories of this paper are: math
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The categories of this paper are: cond-mat
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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-th