Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New COMPASS results on Collins and Sivers asymmetries   The study of transverse spin and transverse momentum effects is an important
part of the scientific program of COMPASS, a fixed target experiment at the
CERN SPS. For these studies a 160 GeV/c momentum muon beam is scattered on a
transversely polarized nucleon target, and the scattered muon and the forward
going hadrons produced in DIS processes are reconstructed and identified in a
magnetic spectrometer. The measurements have been performed on a deuteron
target in 2002, 2003 and 2004, and on a proton target in 2007 and 2010. The
results obtained for the Collins and Sivers asymmetries from the data collected
in 2010 are here presented for the first time. They nicely confirm the findings
of the 2007 run and allow for reduction of the errors by more than a factor of
two.

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The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: cs
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The categories of this paper are: ao-sci
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The categories of this paper are: stat
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: hep-ph
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The categories of this paper are: math-ph
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The categories of this paper are: plasm-ph