Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bayesian Monte Carlo extraction of sea asymmetry with SeaQuest and STAR
  data   We perform a global QCD analysis of unpolarized parton distributions within a
Bayesian Monte Carlo framework, including the new $W$-lepton production data
from the STAR Collaboration at RHIC and Drell-Yan di-muon data from the
SeaQuest experiment at Fermilab. We assess the impact of these two new
measurements on the light antiquark sea in the proton, and the
$\bar{d}-\bar{u}$ asymmetry in particular. The SeaQuest data are found to
significantly reduce the uncertainty on the $\bar{d}/\bar{u}$ ratio at large
parton momentum fractions $x$, strongly favoring an enhanced $\bar{d}$ sea up
to $x \approx 0.4$, in general agreement with nonperturbative calculations
based on chiral symmetry breaking in QCD.

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The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat