Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Constraint on the x Dependence of the Light Antiquarks Ratio   We perform a careful study on the effect of the Pauli blocking to the light
antiquark structure of the proton sea. We develop the formal expressions for
the antiquark distributions, highlighting the role played by quark statistics
and the vacuum structure. Ratios involving the antiquarks are calculated. In
particular, it is found that $\Delta\bar{d}(x)/\Delta\bar{u}(x)$ should be
negative and x independent.

21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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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: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin