Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polarized antiquark flavor asymmetry in Drell-Yan pair production   We investigate the role of the flavor asymmetry of the nucleon's polarized
antiquark distributions in Drell-Yan lepton pair production in polarized
nucleon-nucleon collisions at HERA (fixed-target) and RHIC energies. It is
shown that the large polarized antiquark flavor asymmetry predicted by model
calculations in the large-N_c limit (chiral quark-soliton model) has a dramatic
effect on the double spin asymmetries in high mass lepton pair production, as
well as on the single spin asymmetries in lepton pair production through
$W^\pm$-bosons at $M^2 = M_W^2$.

34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: eess
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph