Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Predictions for top quark spin correlations at the Tevatron and the LHC
  at next-to-leading order in alpha_s   Predictions for angular distributions of top quark decay products that are
sensitive to t tbar spin correlations are presented at next-to-leading order in
alpha_s for the Tevatron and the LHC.

18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg